Star Trek: The Original Series (TOS)
Star Trek originally aired on NBC, from September 8th 1966 through June 3rd 1969, for a total of 79 episodes in just over 3 years. You can download individual episodes from iTunes, with CGI "enhanced" starships and effects:
Here's an example of a typical show storyline:
Episode 46, Season 2 (01/05/1968)
The Gamesters of Triskelion
Jim's team, meanwhile, is suddenly attacked by four strange humanoids. The crew is overpowered and fitted with "collars of obedience" by Galt, master Thrall of the planet Triskelion, and taken to prison cells.
The prisoners each have a Thrall "trainer" to help condition them for the wargames that are played constantly on Triskelion. Kirk's trainer is, predictably, a beautiful yet easily manipulated alien woman. She falls in love with him, and so Kirk naturally uses this to his advantage and proceeds to hit her in the face with his fist and knock her out.
Kirk steals his woman's cell key and frees himself and his crew. Galt sees this happening and suddenly appears, using the shock collars to regain control of the prisoners. He forces Jim to a fight to the death against his minions, but Jim defeats them all. Galt is forced to promote all crew members, under the direction of The Providers (off-camera booming voices, like the Voices of God).
So Jim and crew eventually unveil the true nature of The Providers and Jim makes a bet with them: "Let me fight your best warriors and if I lose, you can have my whole crew, a fresh new set of warriors to play your games. But if I win," he continues, "you have to let us all go."
I won't spoil the ending.