Debuts
- January 2 - The Bob Cummings Show premieres on NBC (1955–1959).
- January 15 – The Benny Hill Show (UK) premieres on BBC Television, later moving to ITV (1955–1989). Its global audience figures will be counted in the billions.
- January 22 – Ozark Jubilee, the first popular country music show on American network television, premieres on ABC (1955–1960), starring Red Foley
- June 28 – Talent Varieties airs on ABC through November 1.
- June 29 – Life With The Lyons (UK), one of the first successful British sitcoms (though starring the American, Ben Lyon), premieres on BBC Television (1955–1960).
- July 2 – The Lawrence Welk Show premieres on ABC (1955–1982).
- July 9 – Dixon of Dock Green (UK) premieres on BBC Television (1955–1976).
- July 20 – Frankie Laine Time premieres on CBS (1955–1956).
- July 29 – This Is Your Life (UK) premieres on BBC Television (1955–2003).
- September 10 – Gunsmoke premieres on CBS (1955–1975).
- September 10 - It's Always Jan, starring Janis Paige, premieres on CBS, prior to Gunsmoke on Saturday evenings (1955–1956).
- September 12 - Medical Horizons premiers on ABC (1955–1956).
- September 20 – Cheyenne premieres on ABC (1955–1962).
- September 26 – Jungle Jim premieres in syndication (1955–1956)
- September 28- Brave Eagle premiers on CBS. (1955–1956)
- October 1 – The Honeymooners premieres on CBS, starring Jackie Gleason, Art Carney and Audrey Meadows (1955–1956).
- October 2 – Alfred Hitchcock Presents premieres on CBS (1955–1962).
- October 3 – Captain Kangaroo premieres on CBS (1955–1984).
- October 3 – Mickey Mouse Club premieres on ABC, featuring "Mouseketeer" Annette Funicello (1955–1959).
- October 20 - Wanted, a crime documentary hosted by Walter McGraw, premieres on CBS but runs only for three months (1955–1956).
- October 22 – Quatermass II (UK), sequel to 1953's The Quatermass Experiment, premieres on BBC Television. It ends on November 26.
Read more about this topic: 1955 In Television