Dr. Fred Harmon on the Netflix series Fuller House. Thomas' best-known television roles are as Mark Singleton in Another World (1983–85), and as Geoffrey Wells on Who's the Boss?. He had recurring roles in series such as Murphy Brown, Matlock, Life Unexpected, and The Division. He has appeared in such films as Pacific Rim, About Last Night..., The Contender, Summer School, and The Banger Sisters. He has also made appearances on such television series as Misfits of Science, Midnight Caller, Party of Five, Pacific Blue, Queer as Folk, NCIS, NCIS: Los Angeles, CSI, CSI:Miami, CSI:NY, Criminal Minds, Franklin & Bash, Castle, and Manhattan, among others.