Cook appeared on a wide variety of American television series from the early 1950s to the late 1980s. He played a private detective, Homer Garrity, in an episode of "Adventures of Superman" television series titled "Semi-Private Eye," airing for the first time on January 16, 1954. That same year, on April 12, he guest-starred on NBC's "The Dennis Day Show." In 1960, he was cast in the episode "The Hermit" of the ABC sitcom "The Real McCoys" with Walter Brennan. He appeared too in 1960 as Jeremy Hake in the episode "The Bequest" of the ABC western series "The Rebel", which starred Nick Adams. He also portrayed the character Gideon McCoy in the 1966 episode "The Night of the Bars of Hell" on "The Wild Wild West". He performed as well in the second episode of ABC's crime drama "The Fugitive".