Baer guest-starred in the 1950s on NBC's "The Dennis Day Show" and "It's a Great Life", on CBS's "Hey, Jeannie!", on ABC's "The Law and Mr. Jones" with James Whitmore, on the syndicated crime drama "Johnny Midnight" with Edmond O'Brien, and on the NBC children's western series, "Fury" with Peter Graves and Bobby Diamond. He made six guest appearances on "Perry Mason" during the last five seasons of the CBS legal drama, including the role of Edward Farraday in the 1962 episode, "The Case of the Captain's Coins," and Willard Hupp in the 1963 episode, "The Case of the Bouncing Boomerang."