Initial success Thomerson entered the world of stand-up comedy in the 1970s. In Los Angeles, he became a regular at
The Comedy Store and
the Improv and made numerous appearances on television variety shows and in Las Vegas. One of Thomerson's early acting breaks came from director
Robert Altman who, after seeing Thomerson's stand-up act, cast him in the film
A Wedding. Thomerson first came to prominence in the short-lived comedy science-fiction TV series,
Quark in 1977–78, as Gene/Jean, a character of dual gender who randomly switched between the two.
Feature film actor Thomerson began a long career in television and film starting in the mid-1970s, starting with roles such as the criminal psychologist Jerry Moriarity in the slasher film,
Fade to Black (1980) before moving on to starring roles such as the time-traveling future cop
Jack Deth in the 1985 low-budget science-fiction film,
Trancers. (1991), a
Dirty Harry-like alien cop who is only tall; the character also appeared briefly in
Bad Channels and more substantially in
Dollman vs. Demonic Toys In the 1990s, he was a series regular on the TV police drama,
Sirens, followed by a regular, co-starring role on the series, ''
Land's End''. ==Filmography==