The Doctor visits the planetTigella, where he sees the Dodecahedron and befriends the planet's leader, Zastor. Zastor remembers the Doctor as one who "can see the strings that bind the Universe together, and mend them when they break." (DW: Meglos)
Dr.Leonard McCoy saves Edith Keeler from death, setting in motion a series of events that leads to a Nazi victory in World War II. McCoy remains a permanent resident of 20th century Earth in this timeline. [2]
The following DC Comics creators passed away in the year 1930.
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Earth-S: Billy Batson is born. When he is approximately ten-years-old he will become the super-hero known as Captain Marvel. Note: Date approximated based upon relative age of Batson at the time of his first appearance.
A schism brings chaos to the Order of Ancient Mysteries. Member Ruthven Sykes betrays the Order and steals a large sum of money as well as several mystical artifacts that once belonged to Dream. He and Ethel Cripps move to San Francisco.
Ruthven Sykes sells the helm of Dream to the demon Choronzon for protection. In exchange, Choronzon enchants the Dreamstone, giving Sykes protection against the vengeful Roderick Burgess so long as he wears it.