* James Stacy as Scott Lancer
* Wayne Maunder as Johnny Lancer
* Murdock MacQuarrie as Brett Lancer
There were also a number of recurring guest stars and actresses who appeared in various episodes over the course of the show. Some of the more notable names include:
* Diana Sands (episode "The Lady's in the Sand")
* Dabney Coleman (episode "The Town That Time Forgot")
* John Anderson (episode "The Executioner")
* Robert Lansing (episode "The Hanging")
* Lloyd Bochner (episode "The Killing Kind")
* Cameron Mitchell (episode "The Duel")
* Robert Forster (episode "The Law of the Land")
* Jo Ann Pflug (episode "The Long Ride")
* Charles Bronson (episode "The Savage")
* Robert Duvall (episode "The Homecoming")
This is not an exhaustive list, as many other actors and actresses appeared in "Lancer" over its two-year run. You can find a more detailed list of cast members and guest stars on websites like IMDb.