No. 73 (1982–1988) watch online

No 73, later retitled 7T3, is a British 1980s children's TV show produced by TVS for the ITV network. It was broadcast live on Saturday mornings and ran from 2 January 1982 to 27 March 1988. The show had an ensemble cast including Sandi Toksvig, Neil Buchanan, Patrick Doyle, Andrea Arnold, Kim Goody and Kate Copstick.

When TVS won the contract to provide ITV coverage for the South of England in 1980, the first thing they set up was a children's department. A team put together with a background in theatre and drama, soon decided to produce a Saturday morning show that differed from the usual Tiswas and Saturday Superstore formula: This show would feature actors in character as hosts, performing their own comedic storyline around the usual guests, music videos, competitions and cartoons. Much of the show was improvised and a whole week of rehearsals plus an extensive dress rehearsal on Friday preceded each live broadcast on Saturday morning.

Source: Wikipedia (CC BY-SA)