He played another character that nearly died on the Robert Young medical drama "Marcus Welby, M.D.". During the mid-1970s, Tochi spent time in the theatre, this time reprising his role as Crown Prince Chulalongkorn in the Los Angeles Civic Light Opera's revival of the musical "The King and I" at the Dorothy Chandler Pavilion. There he co-starred with actor Ricardo Montalbán, as the King of Siam, to which they would later accompany the show as it went on tour. Tochi returned to star in another TV series "Space Academy" (1977–1979) with veteran actor Jonathan Harris (best remembered as Dr. Smith from "Lost in Space"). His character, Tee Gar Soom, had super-strength and continued the martial arts traditions of his Asian ancestors. During hiatus of the show, Tochi was asked to shoot a 20-minute promotional "behind-the-scenes" visit to the Space Academy for a popular daytime series, "Razzmatazz", on CBS. "Razzmatazz" was a highly regarded news magazine show created by "60 Minutes" wizard Don Hewitt and produced by Joel Heller with the same production team as CBS's "In The News" the long-running Saturday morning news programs for children. "Razzmatazz" originally starred Barry Bostwick, who opted to leave the show for a career in features, to capitalize on his recently released cult classic "The Rocky Horror Picture Show". Searching for a new host, the television network persuaded Tochi to accept their offer of his own daytime show, which aired on the network for 4 more years into the early 1980s. Other appearances include a guest stint on "Wonder Woman", a recurring character in the tropically set "Hawaii Five-O", starring actor Jack Lord, a two-hour TV movie "We're Fighting Back" (with Ellen Barkin and Stephen Lang), and regular television roles in the TV dramas "St. Elsewhere" and "Santa Barbara". He later played featured characters in episodes of "" (making him one of only a handful of living actors to ever have appeared on the original "" series and a subsequent spin-off). Tochi also appeared as the titular character in "Wong's Lost and Found Emporium," the ninth episode from the first season of the television series "The Twilight Zone". The episode is based on the short story "Wong's Lost and Found Emporium" by William F. Wu, first published in "Amazing Stories" in 1983.