The 15th episode of Land Of The Lost premieres on NBC. This episode is a “clip show” built around highlights from earlier episodes. 
The 15th episode of Land Of The Lost premieres on NBC. This episode is a “clip show” built around highlights from earlier episodes.
The 16th episode of Land Of The Lost premieres on NBC. Ron Masak (Laserblast) guest stars in an episode co-written by David Gerrold and Larry Niven.
The 17th episode of Land Of The Lost premieres on NBC. The first season finale is co-written by Larry Niven and David Gerrold under the assumption that the series will not be picked up, yet a second season is ordered.
The TV movie-of-the-week The Invisible Man airs on NBC, starring David McCallum (The Man From UNCLE, Colditz), Melinda Fee, and Jackie Cooper. This is the first TV series to credit Harve Bennett (of The Six Million Dollar Man and Star Trek II) as one of its creators, alongside Steven Bochco, for whom The Invisible Man is his second such credit. The movie achieves a high enough rating to merit a series pickup later in 1975.
The 18th episode of Land Of The Lost premieres on NBC. The second season premiere is written by Margaret Armen.
NBC premieres Flames Of Doom, the first episode of Return To The Planet Of The Apes, an animated Saturday morning offshoot of the Planet Of The Apes film/TV franchise. With no solid connecting tissue to the previous Apes sagas, this is Planet Of The Apes for kids, as produced by Ruby-Spears Enterprises. 
NBC airs the first weekly episode of The Invisible Man, starring David McCallum (The Man From UNCLE, Colditz), Melinda Fee, and Craig Stevens (taking over Jackie Cooper’s role from the pilot movie). Robert Alda (Supertrain) and Conrad Janis (Quark) guest star.
The 19th episode of Land Of The Lost premieres on NBC.
NBC airs the second episode of Return To The Planet Of The Apes, an animated Saturday morning offshoot of the Planet Of The Apes film/TV franchise, produced by Ruby-Spears Enterprises.
NBC airs the second episode of The Invisible Man, starring David McCallum (The Man From UNCLE, Colditz), Melinda Fee, and Craig Stevens. Ross Martin (The Wild Wild West) and Michael Pataki (The Amazing Spider-Man) guest star.
NBC airs the third episode of The Invisible Man, starring David McCallum (The Man From UNCLE, Colditz), Melinda Fee, and Craig Stevens. John Vernon (Dirty Harry) and Loni Anderson (WKRP In Cincinnati) guest star.
NBC airs the fourth episode of The Invisible Man, starring David McCallum (The Man From UNCLE, Colditz), Melinda Fee, and Craig Stevens. Barbara Anderson (Ironside, Mission: Impossible) guest stars.
NBC airs the fifth episode of The Invisible Man, starring David McCallum (The Man From UNCLE, Colditz), Melinda Fee, and Craig Stevens. Nehemiah Persoff guest stars.
NBC airs the sixth episode of The Invisible Man, starring David McCallum (The Man From UNCLE, Colditz), Melinda Fee, and Craig Stevens. David Opatoshu guest stars.
The ninth episode of Land Of The Lost premieres on NBC, as Rick Marshall finds himself having to depend on the help of a Sleestak to escape more aggressive Sleestaks.
NBC airs the seventh episode of The Invisible Man, starring David McCallum (The Man From UNCLE, Colditz), Melinda Fee, and Craig Stevens.
The tenth episode of Land Of The Lost premieres on NBC. This episode is a “clip show” built around highlights from earlier episodes.
NBC airs the eighth episode of The Invisible Man, starring David McCallum (The Man From UNCLE, Colditz), Melinda Fee, and Craig Stevens. Roger C. Carmel (Star Trek’s Harry Mudd) guest stars.
NBC airs the made-for-TV movie Alien Lover as that week’s NBC Mystery Movie, starring Pernell Roberts and, in one of her earliest TV appearances, Kate Mulgrew.
NBC airs the ninth episode of The Invisible Man, starring David McCallum (The Man From UNCLE, Colditz), Melinda Fee, and Craig Stevens.
NBC airs the tenth episode of The Invisible Man, starring David McCallum (The Man From UNCLE, Colditz), Melinda Fee, and Craig Stevens. Nancy Kovack and Peter Donat (Time Trax) guest star.
The Gerry Anderson-produced educational sci-fi TV movie Into Infinity airs on NBC as part of the Special Treat series. (It will air later in the UK under the title Gerry Anderson’s The Day After Tomorrow.) Brian Blessed (Flash Gordon) and Nick Tate (Space: 1999) star.
NBC airs the 11th episode of The Invisible Man, starring David McCallum (The Man From UNCLE, Colditz), Melinda Fee, and Craig Stevens. Monte Markham guest stars.
NBC airs the 12th and final episode of The Invisible Man, starring David McCallum, Melinda Fee, and Craig Stevens. Following the show’s cancellation, producer Harve Bennett will retool the series’ concept and reintroduce it, with a different cast, as Gemini Man a few months later.
NBC premieres the pilot movie Gemini Man, a retooling of the concept of The Invisible Man series the network cancelled earlier in the year. The movie stars Ben Murphy, Katherine Crawford, and Richard Dysart (L.A. Law). A very brief series will premiere as part of NBC’s fall season.
NBC airs the first episode of Gemini Man, starring Ben Murphy and Katherine Crawford; William Sylvester takes over Richard Dysart’s role from the pilot movie, and Andrew Prine and country music artist Jim Stafford guest star. This episode becomes infamous for a later appearance on Mystery Science Theater 3000.
NBC airs the second episode of Gemini Man, starring Ben Murphy, Katherine Crawford, and William Sylvester (2001: a space odyssey). Ross Martin (The Wild Wild West) guest stars.
NBC airs the third episode of Gemini Man, starring Ben Murphy, Katherine Crawford, and William Sylvester (2001: a space odyssey). Nancy Malone (Naked City, Capricorn One) guest stars.
NBC premieres The Fantastic Journey, a “sci-fi-lite” series featuring such Star Trek veterans as story editor D.C. Fontana and director Vincent McEveety, but dealing mainly with familiar concepts (the lost city of Atlantis, post-apocalyptic futures that look a lot like southern California, etc.). It lasts only ten episodes before it’s cancelled.
The second episode of the short-lived NBC series The Fantastic Journey premieres. Katie Saylor joins the cast as Liana, a character not included in the original series outline who helps the few holdovers from the pilot episode.