Witney made his television debut as a regular on the ABC drama The Travels of Jaimie McPheeters, which aired during the 1963-64 season. Fellow TOS guest star Meg Wyllie was also a regular on this series. He went on to work with a number of other TOS alumni while making appearances on The Richard Boone Show (with Warren Stevens), Bonanza (four episodes, including one with Glenn Corbett, another with Hal Baylor, and yet another with Morgan Woodward), Gunsmoke (with Charles Seel), Twelve O'Clock High (with Robert Lansing, Frank Overton, and Bert Remsen), Daniel Boone (with Jon Lormer), The F.B.I. (with Jonathan Lippe and Ken Lynch), Owen Marshall: Counselor at Law (with William Schallert and Louise Sorel), The Sixth Sense (with Jason Wingreen), and Cannon (with Barbara Babcock, Bill Erwin, an