Courtesy of Britain from Above comes this aerial photograph looking north over Crouch End in 1938, with the Clock Tower up in the top left:
Note the little puff of steam at the bottom of the photograph from a train running along what is now the London Overground train line through Crouch Hill station.
What is now Elthorne Park was all housing at the time. A reader tells me the park was created as part of a 1960s housing clearance scheme.
No sign of Doctor Who in this photo, though.