Land of the Giants is an hour-long American science fiction television program lasting two seasons beginning on September 22, 1968, and ending on March 22, 1970. The show was created and produced by Irwin Allen. Land of the Giants was the fourth of Allen’s science fiction TV series. The show was aired on ABC and released by 20th Century Fox Television. The series was filmed entirely in color and ran for 51 episodes. The show starred Gary Conway and Don Marshall. Author Murray Leinster also wrote three novels in 1968 and 1969 based on the television series.

Voyage to the Bottom of the Sea is a 1960s American science fiction television series based on the 1961 film of the same name. Both were created by Irwin Allen, which enabled the movie’s sets, costumes, props, special effects models, and sometimes footage, to be used in the production of the television series. Voyage to the Bottom of the Sea was the first of Irwin Allen’s four science fiction television series as well as the longest running. The show’s main theme was underwater adventure.

Voyage was broadcast on ABC from September 14, 1964 to March 31, 1968, and was the decade’s longest-running American science fiction television series with continuing characters. The 110 episodes produced included 32 shot in black and white, and 78 filmed in color. The first two seasons took place in the then future of the 1970s. The final two seasons took place in the 1980s. The show starred Richard Basehart and David Hedison.