Hitchhiked to New York from California after leaving college at age 19 to begin an acting career in the theater
Put acting career on hold for a time when he served in the Air Force
Worked at the Stratford Theater in Ontario, Canada
Was an actor at the Fred Miller Theatre in Milwaukee, Wisconsin
Worked as an actor at the Arena Stage in Washington, DC
Was an actor for the Theater of the Living Arts, Philadelphia, Pennsylvania
Was a member of the company of the Old Globe Theater in San Diego, CA (date approximate)
Performed in regional and off-Broadway productions
Film debut in "Cool Hand Luke"
Began lengthy ongoing stage association with the Mark Taper Forum in Los Angeles
TV-movie debut in "The Priest Killer"
Returned to the Old Globe Theater company
First TV series as regular, "Harry O", an ABC detective drama starring David Janssen, in which Zerbe played Lieutenant K.C. Trench
Began lengthy ongoing theatrical association with the Seattle Repertory Company
First TV miniseries, "Once an Eagle"
First performed his one-man stage show, "It's All Done with Mirrors", an evening of poetry written by e e cummings
First performed in the two-man show, "Behind the Broken Words", alongside Roscoe Lee Browne, a collection of poetry by modern American writers (later performances would include New York City's American Place Theater in 1981)
Played Martin Grey on the ABC Western series, "How the West Was Won", starring James Arness and Eva Marie Saint
Acted on Broadway as Benjamin Hubbard in support of Elizabeth Taylor in a revival of the Lillian Hellman drama, "The Little Foxes"
Returned to Broadway in the short-lived production "Solomon's Child"; play opened on April 8 and closed April 10
First non-US feature credit, the British-made James Bond film, "License to Kill", his last feature for six years
Played series regular role of Teaspoon Hunter on the ABC Western drama series, "The Young Riders"
Became associate artistic director of the GeVa Theater in Rochester New York; started an annual new plays festival, Reflections, for which he has also directed some plays
Returned to the big screen as a priest in "Touch"
Had featured role in "Star Trek: Insurrection"