The series contains a number of references to Doctor Who (1963) including a character called Matthew Waterhouse (Matthew Waterhouse played Adric in "Doctor Who") and another called Michael Craze (Michael Craze played Ben Jackson in "Doctor Who"). Tom Baker, who played The Doctor from 1974-1981, is also the announcer.
Tom Baker is the Narrator in the show. Tom Baker is famous for playing the 4th Doctor Who. Although references to "Doctor Who" are made in the show: Matt Lucas had played The 2nd Doctor in a "Doctor Who" parody in the 3rd season of "Shooting Stars" and David Walliams later made a guest role in "Doctor Who" The God Complex (#6.11) as Gibbis.
Narrator: When people in Britain want to buy a pet, they go to a pet shop. If they want to buy a pet shop, they go to a pet shop shop. If they want to buy a pet shop shop, well, they're just being silly.