In 1951, Peck replaced Eric Fleming in the title role of Major Dell Conway of the Flying Tigers on the DuMont Television Network.

[2] In 1969 Peck appeared as the Hotel Manager on the TV Series The Virginian in the episode titled "Journey to Scathelock."

One of his highest profile parts was among his last, in the television series Happy Days, in the recurring role as police officer Kirk[3] from 1975 to 1983.

[3]: 520  He also was a member of the cast of the summer 1972 television situation comedy The Super, portraying Officer Clark, a tenant in a New York City apartment building.

He also guest-starred on dozens of television series including The Untouchables, Perry Mason, The Fugitive, Kentucky Jones, Get Smart, Gunsmoke, Star Trek ("Tomorrow Is Yesterday", 1967), Cannon, and Bonanza, as well as films such as Heaven Can Wait, Bullitt, Cheech and Chong's Next Movie, and The Prisoner of Second Avenue.