Joan Evans and Harvey Stephens in "The Sky Diver", the unaired pilot episode of Ripcord of that same year. Then he was cast as John T. Metcalf in the 1962 episode "Mile-Long Shot to Kill" of the CBS anthology series GE True, hosted by Jack Webb. Also, in 1962, he was cast as Bob Murkland in the 6 March Season 3, episode 22 of Laramie, 'The Dynamiters'. In April of that same year, he was cast as Doctor Ross in the episode "Allergies Anonymous" of The Real McCoys. Also that year he played a role in Tales of Wells Fargo. Then in 1963, he was cast in the episode "Mutiny at Fort Mercy" of the short-lived ABC/Warner Bros.' Western series The Dakotas, and later he performed in the premiere of another short-lived ABC show, Breaking Point, a medical drama series starring Paul Richards and Eduard Franz. From January 1959 to May 1960, Johnson co-starred as Marshal Gib Scott on the television series Black Saddle, which lasted two seasons—its first on NBC and its second on ABC. Twilight Zone and Outer Limits episodes Johnson appeared in two episodes of The Twilight Zone. His character brings a murderer from 1880 into the present via a time machine in the season-one episode "Execution". In the season-two episode "Back There", his character, Peter Corrigan, attempts to prevent the assassination of Abraham Lincoln. The plot of both episodes involved time travel from the 20th to the 19th centuries. Johnson also appeared on The Outer Limits in 1964, playing a crewmember on a United States space station in the episode "Specimen: Unknown". "The Professor" on Gilligan's Island Johnson was best known for playing Professor Roy Hinkley (usually called the "Professor"), the very knowledgeable polymath who could build all sorts of inventions out of the most rudimentary materials available on the island. As Johnson himself pointed out, though, he could not fix the hole in the boat. In the first episode of the show, the radio announcer describes the Professor as a research scientist and well-known scoutmaster. Gilligan's Island aired from 1964 to 1967, but has been shown in reruns continuously ever since. Johnson reprised this character in three Gilligan's Island made-for-television movies and two animated series. In a 2004 interview, Johnson commented about the role and shared his perspective regarding Gilligan's Island and the situation comedy's place in television history: After Gilligan's Island After Gilligan's Island,