Debuts
- January 5 – Television Newsreel (UK) is first shown on the BBC Television Service (1948–1954).
- June 8 – Milton Berle becomes the first United States television star with the debut of Texaco Star Theater (later The Milton Berle Show) on NBC (1948–1953).
- June 20 – Toast of the Town, with Ed Sullivan, premieres on CBS, with guests Dean Martin and Jerry Lewis (later renamed, The Ed Sullivan Show) (1948–1971).
- July 1 – Mark Goodson's first game show Winner Take All premieres on CBS (1948–1952).
- August 10 – Candid Microphone (renamed Candid Camera in 1949) debuts on ABC (1948–present).
- The Adventures of Oky Doky premieres (1948–1949).
- Amanda (1948–1949).
- The Bigelow Show premieres (1948–1949).
- Champagne and Orchids (1948–1949).
- Child's World debuts (1948–1949).
- Actor's Studio (1948–1950).
- Cartoon Teletales (1948–1950).
- The Alan Dale Show premieres (1948–1951).
- Club Seven (1948–1951).
Read more about this topic: 1948 In Television