(written from a Production point of view)
Colman has been acting in film and television since the early 1950s, amassing well over one hundred credits. One of his earliest film roles was as a reporter in the 1954 science fiction classic Them!, in which he, Leonard Nimoy, Lawrence Dobkin, and William Schallert appeared uncredited. He also appeared in the 1958 B-movie The Beast of Budapest alongside John Hoyt. This was followed with small roles in numerous other films, including 1961's The Comancheros (with Michael Ansara, Jon Lormer, Gregg Palmer, and Nehemiah Persoff). He also had a recurring role as Dr. Zaius on the 1970s television series Planet of the Apes, co-starring Mark Lenard, and appeared in the 1977 TV-movie In the Glitter Palace with Salome Jens, Robert Sampson, Stanley Kamel, Lee Delano, and Anthony Zerbe.