With his wife, Vivi Janiss, who was formerly married to Bob Cummings, Larch appeared on October 3, 1961, in the premiere episode "No Fat Cops" of Leslie Nielson's The New Breed on ABC. The two played a couple, John and Mary Clark. Earlier the two had co-starred on November 23, 1959, as Johnny and Elsie in the episode "End of an Era" of NBC's western series Tales of Wells Fargo, starring Dale Robertson; and on May 23, 1960, as Isaiah and Rebecca Macabee in the episode "The Proud Earth" of the half-hour NBC anthology series Goodyear Theatre. On November 9, 1960, Larch and Janiss appeared as Ben and Sarah Harness in the episode "The Cathy Eckhart Story" of NBC's Wagon Train, with Susan Oliver in the starring role. Then on December 19, 1968, the couple appeared again together in the tenth episode "Yesterday Died and Tomorrow Won't Be Born" of Jack Lord's CBS crime drama Hawaii Five-O.