Debuts
- January 6 - Kate debuts on ITV (1970–1972)
- January 5 – Soap opera All My Children premieres on ABC (1970–2011).
- February 17 – McCloud pilot airs on NBC (1970–1977). The series becomes a regular show the following fall as part of Four in One.
- March 30 – Soap opera Somerset premieres on NBC (1970–1976), while fellow soaps A World Apart (1970–1971) and The Best of Everything (1970) make their debut on ABC. It marks the last time multiple soaps premiere on the same day in the US.
- September 12 – Josie and the Pussycats, premieres on CBS Saturday morning (1970–1974).
- September 16 – UFO debuts on ITV (1970–1971).
- September 17 – The Flip Wilson Show premieres on NBC (1970–1974).
- September 19 – The Mary Tyler Moore Show premieres on CBS (1970–1977).
- September 21 – NFL Monday Night Football premieres on ABC (1970–Present); it moved to ESPN in 2006.
- September 24 – The Odd Couple premieres on ABC (1970–1975).
- September 24 – Barefoot in the Park premieres on ABC (1970–1971).
- September 25 – The Partridge Family premieres on ABC (1970–1974).
- Adventures in Rainbow Country premieres on CBC (1970–1971).
- Doomwatch debuts on BBC1 (1970–1972).
- Party Game premieres (1970–1980).
- Play for Today supersedes The Wednesday Play on BBC1. The anthology drama series lasts until 1984.
- November – Mr Benn premieres on BBC in syndication.
Read more about this topic: 1970 In Television