Among the many television series in which he was cast as a guest star were "Cimarron City", "The Californians", and "The Rifleman". Edgar appeared in six episodes of "The Rifleman", playing Grandpa Fogerty in “The Long Goodbye” (episode 119) and Doc Burrage in the other five: “The Pet” (episode 15), “The Second Witness” (episode 23), “The Trade” (episode 24), “The Deadly Wait” (episode 26), and “The Angry Man” (episode 31). He portrayed Jed Christianson in the episode "Duel at Sundown" on "Maverick" with James Garner and Clint Eastwood, and was on "Leave It to Beaver" (as both "Uncle Billy" and "Captain Jack"), "The Twilight Zone", "Riverboat" (as Wingate Pardee in the 1960 episode, "Duel on the River"), "Gunsmoke", "Route 66", "Bringing Up Buddy", "Bus Stop", and "The Lloyd Bridges Show".