Whose Doctor Who
Whose Doctor Who was broadcast on BBC2, on Sunday, 3 April 1977 (the day after part six of The Talons of Weng-Chiang had aired); it was part of the "Lively Arts" series, and was presented by Melvyn Bragg.
Various clips were featured, with those of the first and second Doctors extracted from the pitiful selection of black and white episodes that still existed by late 1976, with Pertwee clips in black and white or colour, again depending on the format of the still-existing material.
The special was screened on BSB on Sunday, 23 September 1990 during the special Doctor Who weekend.
As far as can be determined, Whose Doctor Who was never aired by a foreign television station. (Some of the US stations aired a documentary called Doctor Who's Who's Who, but this was a different production, made in 1985.)