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Up to date as of February 07, 2010

The Star Trek Expanded Universe Database is for fanon and related content. See for the canon Star Trek wiki.

For alternate reality characters or other characters with the same name, see John Sill (Live to Tell), John Sill (mirror) and John Sill (Pendragon universe).

John David Sill was the commanding officer of the USS Prospect from 2365 until 2370, USS Prospect (NCC-60056-A) in 2371 and 2372 and a member of Special Operations.




Early history

John Sill was born near Chicago on Earth in 1974.

During the Eugenics Wars, one faction detonated biogenic weapons, rendering thousands of people on Earth unconscious and riddled with an incurable medical condition; Sill was one of the victims. The United Nations voted to place the victims in cryosatellites in orbit of Earth, but most of these sleeper ships mysteriously disappeared in the early 21st century.

Starfleet later came to the conclusion the wake from the USS Voyager's trip to 1996 dragged these cryosatellites into the 23rd and 24th centuries, dispersing them throughout the Alpha and Beta Quadrants.

The cryosatellite Sill's body was stored aboard was discovered around 2353.

This cryosatellite was not the same as the one Scott Fack's body was aboard.


John Sill was serving as first officer aboard the USS Artemis during the tail-end of the Federation-Cardassian War. Aboard the Artemis, Sill would become friends with Scott Fack and Anne Cobry, amongst others.

Sill, aboard the Artemis, participated in the Battle of Ubessi in orbit of the neutral planet Ubessi. As a result of a Starfleet starship slamming into the planet's surface, resulting in massive ecological destruction, he felt an obligation to return to the planet to assist the Ubessians. Weighing heavily on his conscience, Sill, with Cobry and Fack's help, convinced Artemis commanding officer James Ashenfelder to break battle lines and proceed to Ubessi to assist.

He led the away team, with Cobry and Fack present, to find only Yaghim Thau and a handful of his followers stripping the last remaining systems from a military bunker on the planet's surface. Sill attempted to convince Thau to accept their assistance, but Thau instead threatened revenge for the destruction the Federation and Cardassians inflicted on his already civil war-ravaged (but recovering) planet.

After returning to the Artemis, they found Thau had a Galor-class warship under his command, and, with Cardassian forces also approaching, Ashenfelder ordered the Artemis to the safety of Federation-controlled space, despite the urging of Sill to continue to the Ubessians' new planet to convince Thau to accept their assistance. (Star Trek: The Prospect Chronicles: "What a Difference a Day Makes")


In 2364, Captain Ashenfelder ordered the Artemis to return to Federation space after Fack's revelation of an alien conspiracy, Sill was a survivor when a then-unknown force sabotaged and attacked the Artemis, triggering a warp core breach alert. Several survivors, floating in escape pods, reported that Artemis appeared destroyed. (Star Trek: The Prospect Chronicles: "False Security")

Sill later admitted this event nearly caused him to quit Starfleet, or at least take a safe desk job. (Star Trek: The Prospect Chronicles: "Lady Lazarus")


By 2365, Sill held the rank of captain. Later this year, he took command of the Special Operations starship USS Prospect (NCC-60056). (Star Trek: The Prospect Chronicles: "The Tzenkethi Incident")


In late 2366 and early 2367, Sill pushed the Prospect to her limits in trying to arrive at Wolf 359 in time to face the Borg cube.

Admiral J.P. Hanson spoke with Sill with regards to the armada, and a horrified Sill witnessed audio communications from several starships at the Battle of Wolf 359, but by the time they arrived, the battle was finished. Within the starship graveyard, sensors detected a mysterious alien ship apparently communicating with the Borg cube. Sill ordered it pursued and disabled.

Despite his then-first officer Vanessa Brocato's objections, Sill led the away team to the alien ship. Under heavy fire, he ordered his team to surrender to that ship's science officer T'Prain. Once face-to-face with the ship's commanding officer Amila Thon, Sill learned various details about the future: his fight was not against the Borg; he'd go down in history; he would rescue prominent Starfleet officers from Wolf 359; James Lee knew more than he let on, and wasn't telling the truth about who he was; and so on. Thon returned Sill and his team to the Prospect to return to Wolf 359.

Once there, Sill oversaw and coordinated the rescue effort from the Prospect, including the discovery of the salvageable USS Endeavour. Near the end of the rescue mission, after taking Thon's words to heart, he approved Brocato's and second officer Evonne Williams's promotions to the full rank of Commander and transfers to the vacant first officer positions aboard the USS Arlington and USS Barrington respectively.

Thon reappeared to him to urge him to consider taking Cobry and Fack back aboard -- a move he followed -- and hinted to him that Kari Liljehorn would complete the "rank on the chessboard" of players needed for his future fight. (Star Trek: The Prospect Chronicles: "The Burnt Child")

In mid-2367, Sill was still in command of the Prospect when, after repairs were complete, it relaunched from Utopia Planitia Fleet Yards. (Star Trek: The Prospect Chronicles: "The Burnt Child")

A few weeks later, he ordered an away team to infiltrate the city of Enika on Goffan III to determine whether the Jenchum Suzerainty was developing a subspace weapon while he and the Prospect orbited Goffan IV on a mission to improve sensors ability to detect molocine. While in orbit, he and Jenchum battle cruiser Alonia commanding officer Thelius debated on whether the Prospect' actions were legal, but Sill stood his ground, stating the Federation and Jenchum had sorted the details out.

When Liljehorn went missing, Sill sent two away teams to attempt to extract her, the latter of which was successful.

He was also extremely embarrassed to discover James Lee uncovered the Prospect's secret mission to the Jenchum, even though the desired result - discovery the subspace weapon test had been unsuccessful, and the Jenchum went back to developing conventional weapons - was reached. (Star Trek: The Prospect Chronicles: "Starry, Starry Night")

In late 2367, Sill was attending Lee's birthday party when the Prospect received a distress call. Investigating it, the crew discovered the Artemis had not exploded in 2364 but jumped to warp and survived.

An uneasy Sill sent Scott Fack, Anne Cobry, security chief George Serigos, Ensign Garrett, Ralf Mendoza and Steven DiCosola to the Artemis. Fack and his escort Ensign Garrett attempted to locate bodies, but were instead altered by the M'Tar. Transformed into the Liaison, Fack attempted to assist the M'Tar take control of the Federation, but a battle with undercover Na'arbi agent James Lee spoiled that plan. Lee severed Fack and Garrett from M'Tar control and transported them back to the Prospect before the Artemis exploded, dragging him and the two M'Tar into the M'Tar Domain, sealing the portal between the two dimensions.

Sill and Serigos investigated a strange energy pulse emanating from Lee's cabin to find a holographic transmission, warning Sill the M'Tar were growing in number and not near extinction. (Star Trek: The Prospect Chronicles: "Lady Lazarus")

Neither John Sill nor Starfleet revealed the true facts about the M'Tar to Scott Fack as per his comments in "Catalyst, Part One". It is assumed Starfleet was keeping this knowledge close to their chests for unknown reasons. The M'Tar is one of the "far worse" enemies Thon eluded to in "The Burnt Child". Lee being a Na'arbi agent was another such hint.


After the USS Odyssey's destruction by the Jem'Hadar in late 2370, Special Operations quickly assembled the Prospect crew and sent them from Deep Space 9 to the Gamma Quadrant to make first contact with the Founders. This mission failed, resulting in the Prospect's sacrifice in order to halt a Dominion incursion into Federation space. Captain Sill (the commanding officer), and the majority of the Prospect crew, survived on the saucer section, which coasted back through the Bajoran Wormhole to Federation space. (Star Trek: The Prospect Chronicles: "Pure Massacre")

We assume John Sill was court-martialed but found not guilty for the Prospect's loss.


In 2371, the USS Prospect (NCC-60056-A) was launched with John Sill as her commanding officer. Sill wasn't there at the commissioning ceremony, however, as the ceremony was held on Stardate 48650.6 and he took command on Stardate 48788.7. (Star Trek: The Prospect Chronicles: "Home")

On Stardate 48803.2, Sill and his crew investigated radio silence from the USS Venture. Upon arrival, Sill discovered an escaped El-Aurian, captured by the Venture crew a year earlier, wiped every single crew member from existence. Somehow the Prospect crew were protected from this, probably from a temporal barrier around the two ships. Sill and the El-Aurian fought, the former winning, and the Prospect returned him to Federation custody. (Star Trek: The Prospect Chronicles: "The Road Not Taken")

One of Sill's greatest battles was against himself. On Stardate 48892.7, the Prospect senior officers' mirror versions stormed the ship, attempting to hijack the ship. Sill, first officer Anne Cobry, and Sill's brother chief engineer Mike Sill led non-essential personnel to safety and rescued the kidnapped personnel, also forcing the mirror senior crew back through the Iconian gateway they came through. (Star Trek: The Prospect Chronicles: "Paradox")

The Special Operations team, led by John Sill, responded to a distress call from Setlik III on Stardate 48939.4. Massive seismic disturbances threatened to destroy the planet, but further investigations found a massive weapon in the planet's orbit, tapping energy from the planet, its weaponry focused on several Cardassian areas. Sill evacuated most crew members and colony survivors to the Prospect's saucer section and, with a skeleton crew, attempted to use the stardrive section to deflect any blasts while George Serigos attempted to stop the weapon before it triggered an interstellar incident. They were successful. (Star Trek: The Prospect Chronicles: "Heritage")

On Stardate 48994.8, Sill faced yet another of his most deadly enemies: Brigham. The Prospect battled Brigham and his Breen mercenaries. To stave off the multiple attack, Sill ordered the ship separated, the battle so fierce Brigham almost succeeded in forcing the saucer section to crash. Sill's wit and training won, with Brigham and his Breen crews crashing on the planet's surface. The Prospect team took them into custody. (Star Trek: The Prospect Chronicles: "Ramifications")

The Prospect was sent, in 2372, to the Gamma Quadrant to find the USS Rutherford after it disappeared, and John Sill commanded this mission. Successful in discovering the Rutherford but unsure in the whereabouts of its crew, Sill ordered the Rutherford destroyed to stop it falling into Dominion hands. Battles with the Jem'Hadar saw the Prospect suffer heavy damage. (Star Trek: The Prospect Chronicles: "Directive")

Service Jacket

Personal Relationships


Scott Fack

John Sill and Scott Fack met aboard the USS Artemis sometime prior to 2364. Sill being first officer and Fack being counselor, the two worked together quite often on crew performance reviews and their friendship grew from there. (Star Trek: The Prospect Chronicles: "False Security")

In mid-2367, he told Fack and Cobry he was glad to have them back aboard. (Star Trek: The Prospect Chronicles: "The Burnt Child")

Later in the same year, when the Prospect crew received the Artemis's distress call, Sill admitted to Fack and Anne Cobry, his two closest confidants, he considered giving up his career in Starfleet after the Artemis incident in 2364, and shared his deepest, darkest thoughts about the Artemis. Later in the same mission, after the M'Tar took over Fack's body, Sill felt both guilt at sending Fack over and vowed to get Fack back at almost any cost. (Star Trek: The Prospect Chronicles: "Lady Lazarus")

In 2371, Sill missed the Prospect-A's launch and maiden flight, which ended up as a rather eventful affair. John Sill expressed to Fack (who was present) when he took command that he'd hoped Fack and the others hadn't roughed up his ship too much. (Star Trek: The Prospect Chronicles: "Home")

This article uses material from the "John Sill" article on the ST Expanded wiki at Wikia and is licensed under the Creative Commons Attribution-Share Alike License.


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