Crackerjack is a British children's television series which was initially aired on the BBC Television Service between 14 September 1955 and 21 December 1984. The series was a variety show featuring comedy sketches, singers and quizzes, broadcast live with an audience.

Ronald Balfour Corbett was a Scottish actor, broadcaster, comedian and writer. He had a long association with Ronnie Barker in the BBC television comedy sketch show The Two Ronnies. He achieved prominence in David Frost's 1960s satirical comedy programme The Frost Report and subsequently starred in sitcoms such as No – That's Me Over Here!, Now Look Here, and Sorry!