Will is conducting an experiment in a cave and captures a man who claims to be the man who controls time for the entire universe. This ""Time Merchant"" takes Will, Professor Robinson, Smith, and the Robot, to his secret lair. From there, Smith uses the Time Merchant's time machine to return himself to Earth on the day the Robinson's departed, with the objective of NOT sabotaging the Jupiter II mission and letting the Robinsons go on their way to Alpha Centauri. The Time Merchant then announces that if Smith does not get on the Jupiter II, the ship will not fly off course and will therefore be destroyed by a collision with an asteroid several months after liftoff. So Will is sent back to join Smith and try to convince him to get on the Jupiter II as he originally did.
The Happy Gizzard isn't doing so well. Jethro realises what's missing, 'topless' waitresses .! He hires Elly as his waitress & tells her to take off her hat because this place is topless.! Mr Drysdale is sweet talking a prospective new depositor, Mr & Mrs Vanderpont. Unfortunately for Mr Drysdale Jethro ruins his plans & the Vanderponts leave. Miss Jane tells the Clampetts what topless really means. The Vanderponts return & Jed gives them some of Granny's ""white lightnin'"". He then invites them to the Happy Gizzard & Mr Vanderpont likes it so much he buys it off them.
A quirky spy show of the adventures of eccentrically suave British Agent John Steed and his predominantly female partners. Jonathan Steed - an urbane, proper gentleman spy - teams with various assistants throughout the series' run, including Dr. David Keel, Cathy Gale, Emma Peel and Tara King, to repeatedly save the world from diabolical schemes plotted by equally diabolical evil-doers (among them robots and man-eating monsters).
Tony accidentally locks Jeannie in a moon safe and tries desperately to get her out before it is sent to the moon.
When the Barkleys meet a Mexican fleeing a revolution, they vow to help protect him
A teenage burglar involved in a murder is shot and left to die by his partners.
Opie gets a job working at the drugstore and learns that everyone makes mistakes.
John Cannon and Billy Blue are captured by Apaches far from home and made to face death from lack of water. John and Billy force a wounded Indian, Klosen, to lead them toward water but the Apache escapes. Buck and Manolito catch a glimpse of a war party wearing John's and Billy's hats but harsh desert winds make it impossible to track the missing pair. When John and Billy do find water, renegade Chief Soldado ties them to a rock to die of thirst.
Nicholas Groat, a grandmaster chessplayer, organizes a team that plans to steal gold intended for the underground in an Eastern bloc country that was intercepted by the country's authorities. The IMF must recover the gold from the authorities and keep Groat from getting it. Groat forces the authorities to move the gold from a bank to a vault at the hotel where he (and Rollin) are playing in a tournament. The hotel puts a time lock on the vault for extra security, but Groat notices that Rollin is cheating, using a hearing aid. When he forces Rollin to demonstrate, the computer ""inadverently"" accelerates timepieces, so Groat wants to use it to get into the vault. Rollin agrees, but requires Groat use his team. Willy fakes a typhoid outbreak and Dr. Phelps administers shots to the guards which are actually sedatives. With Groat's help they get into the vault, then take the gold at gunpoint and leave him there.
Fariah brings the Doctor and Kent evidence of Salamander's activities but then they come under attack from Benik.
Colonel Hogan receives a stunning message: he's to return home to the U.S.A. for a hero's welcome. The men of Stalag 13, convinced the Hogan will remain at the camp to continue his operation, are further stunned when he is overjoyed at the news—and plans to bid Stalag 13 a fond farewell!
Many of the country's teenagers are dancing constantly, under the spell of the Groovy Guru, who is helping KAOS take over the country via its teenagers. The Guru plans to incite the nation's youth to riot and destroy all government institutions.
The Enterprise visits a planet with an Earth-like 1920s gangster culture.
Speed is in Mexico and must obtain a serum to save the life of a the mayor of a village that is in danger of falling into the hands of the man whom poisoned him.
Vavoom Motor Co. is trying to build a supersonic car, which Speed is testing. Agents from Forthebird Motor Co. sabotage the car, and blame Speed for the accident. They demand a new test driver, but Speed enters their driving tests, and proves again that he is the best driver. Agents from Forthebird Motors put a bomb on the finish line to destroy the car, but Spritle overhears them, and warns Speed.
Remember Sheila Sommers from the pilot? Well, she's back and Larry wants Darrin to go with her to get her father's account with McMann and Tate. At a dinner party, Sheila is up to her usual tricks, and Samantha unleashes a few of her own.
An old friend of Mark's is a suspect in a murder investigation, but Mark refuses to accept that the man may be bad. Ironside tries to convince him otherwise, but in the process risks breaking his own friendship with Mark.
Louie the Lilac is in town, planning to corner the lilac perfume market in Gotham City. His concoction requires the glands of several animals, so he kidnaps Bruce Wayne and Dick Grayson to make the extractions. With "Batman and Robin" unable to respond, Batgirl attempts a rescue, only to be captured herself. The trio rely on their wits (and the latest bat-invention) to attempt an escape.
Jed wants Jethro to open up a business. Jethro decides he wants to be a fry cook & open up a restaurant. Jed tells Mr Drysdale about Jethro's plan to be a fry cook and Mr Drysdale finds a run down old diner that he rents for $35 a week. Jethro fixes up the place & names it the Happy Gizzard. When Jethro's first customer comes in (a young woman)She leaves after Jethro couldn't cook her a hamburger. Granny arrives to save the day & agrees to cook for Jethro.