jayrath said:
...but I wonder if Gene hadn't been watching some 1960s BBC . . .
And how would he have done that, exactly? They didn't have satellite TV in 1966 (which was when the original proposal that later became
Assignment: Earth was written). For that matter, most TV producers don't have a lot of time for actually watching TV, because they're too busy making it.
The original A:E proposal involved Gary Seven being sent back from the future to 1960s Earth to battle time-travelling Omegans trying to change history (an idea surprisingly similar to the Temporal Cold War storyline in
Enterprise some 35 years later). That's very different from
Doctor Who as it existed in 1966, at which point only a very few episodes had been set on present-day Earth. People who see similarities between the Doctor and Gary Seven are basing it mainly on the Pertwee era and after, when stories set on contemporary Earth were far more common. Obviously Roddenberry couldn't have been aware of stories that didn't exist yet, even if he had
heard of
Doctor Who at the time.
More likely, A:E was inspired by the "time police" types of stories that were fairly common in prose SF in the 40s-60s, books like Asimov's
The End of Eternity (Roddenberry and Asimov were friends) and Poul Anderson's
Time Patrol series. Heck, maybe Roddenberry just got the idea from "Tomorrow is Yesterday." According to
The Star Trek Compendium, the original A:E pilot script is dated 11/14/1966 and the final draft script of TiY is dated one week later. So GR would've been working on A:E simultaneously with the writing of TiY (a concept that had been in development since much earlier in the season, since it was originally to be a sequel to "The Naked Time"). Maybe working on a script about the
Enterprise coming back in time to present-day Earth inspired him to come up with a series proposal about an agent sent back in time to present-day Earth.