Season 0 of That's Life! premiered on 1974-12-28.

Season 1 of That's Life! premiered on 1973-05-26.

Season 2 of That's Life! premiered on 1974-03-16.

Season 3 of That's Life! premiered on 1975-03-29.

Season 4 of That's Life! premiered on 1976-01-04.

Season 5 of That's Life! premiered on 1977-01-02.

Season 6 of That's Life! premiered on 1978-05-07.

Season 7 of That's Life! premiered on 1979-01-07.

Season 8 of That's Life! premiered on 1981-01-04.

Billed as being a 15 part series, an episode was replaced by the 1982 Royal Variety Performance.

Season 10 of That's Life! premiered on 1983-04-10.

Season 11 of That's Life! premiered on 1984-01-08.

Season 12 of That's Life! premiered on 1985-01-06.

Season 13 of That's Life! premiered on 1986-01-19.

Season 14 of That's Life! premiered on 1987-01-11.

Season 15 of That's Life! premiered on 1988-01-17.

Season 16 of That's Life! premiered on 1989-01-22.

Season 17 of That's Life! premiered on 1990-01-14.

Season 18 of That's Life! premiered on 1991-01-20.

Season 19 of That's Life! premiered on 1992-01-11.

Season 20 of That's Life! premiered on 1993-01-23.

Season 21 of That's Life! premiered on 1994-01-08.