Johnson found himself somewhat typecast, making portraying more unsophisticated roles other than his signature role as the Professor more difficult. Nevertheless, he was able to resume a sufficient acting career, appearing in several other movies and television shows, especially the latter. He appeared as a guest star in several dramatic series, including The Big Valley with Peter Breck (marking a reunion of sorts, since they co-starred together in Black Saddle, an earlier Four Star Productions series), The Invaders, Death Valley Days, Owen Marshall: Counselor at Law, Lassie, That Girl, Ironside, The F.B.I, and Gunsmoke. He was cast in the miniseries Vanished, based on a novel by Fletcher Knebel (1971), the TV horror movie The Horror at 37,000 Feet (1973), uncredited in the Robert Redford spy thriller Three Days of the Condor (1975), the low-budget thriller Hitch Hike to Hell (1977), and appeared on the episode "Coffee, Tea or Cyanide" on McMillan and Wife in 1977, and on the NBC soap opera Santa Barbara. Johnson had a brief appearance in MacArthur (1977), in which he played United States Navy Admiral Ernest J. King, and he appeared in the 1978 made-for-television movies The Ghost of Flight 401 and The Bastard. Russell provided the narration for the animated-short episodes of The Adventures of Stevie and Zoya that appeared on MTV during the mid-1980s. In an interview with Starlog magazine in the early 1980s, Johnson said that he had wanted to appear in the original Star Trek during its run on NBC from 1966 to 1969, but he was never cast. An episode of CBS' Newhart featured the Beavers (a men's organization) watching a Gilligan's Island episode on television. When they are suddenly evicted from the room, one of them, portrayed by Johnson, protests, "I want to see how it ends!" He is assured that the castaways do not get off the island. Johnson also played the sheriff in several episodes of season 9 of Dallas. His character in that series did not return in season 10, however, as season 9 turned out to be the infamous "dream season". In the late 1980s horror TV series Monsters, Johnson played an elder scientist in the episode Sleeping Dragon, in which he tries communicating with an ancient humanoid dinosaur that was awakened after a 65 million years-long slumber. Johnson entertained fans at the 1996 MST3K Conventio-Con-Expo-Fest-a-Rama 2: Electric Boogaloo on the "Celebrity Panel". Johnson was invited