Dr. Fendleman is working on missile guidance systems, observing a "sonic shadow" during one test launch which leads to his time scanner experiments in the 1970s. (DW: Image of the Fendahl)
The second Doctor Who story, The Daleks introduces the creatures of the same name. Dalekmania sweeps Great Britain. The Daleks, who eclipsed the Doctor himself in popularity, would return several times during the '60's, would arguably never reach the height of popularity as during this time. The second-most popular Doctor Who monster race, the Cybermen, debut in 1966's The Tenth Planet.
In 1964, The Klepton Parasites, the first Doctor Who comic, appeared in TV Comic. Doctor Who comics would, in one form or another, run on into the present.