After Mission: Impossible was cancelled, Morris appeared in movies and made guest TV appearances (1974 -The Six Million Dollar Man - Episode 1-05 "Little Orphan Airplane") before he was cast as Lt. David Nelson during the second season of the TV series Vega$. After the cancellation of that series in 1981, Morris continued to make guest TV appearances in the next decade, including a few episodes in the short-lived 1980s remake of the Mission: Impossible TV series, which starred his son Phil Morris, who was cast as Grant Collier, the son of Barney. He also appeared in two episodes of the TV series What's Happening!! as Lawrence Nelson (father of Dwayne) and in three episodes of The Jeffersons, in which he reprised his role of an electronics expert (although not as Barney Collier) in a comparison sequel of the Mission: Impossible series. Morris was also a frequent guest star on Password and Password Plus in the 1960s and 1970s.