After an off-hand comment puts Barney in the doghouse with Thelma Lou, he sees her spending her free time with Gomer instead. Not wanting to hurt his friend, Gomer tries to get her to stop seeing him by falsely professing his love, but ends up engaged to her instead.
Moody bounty hunter, Dev Farnum, shows up on the Ponderosa, where the Cartwrights are harboring the wife of the man he is after.
Given three months to live by a quack peddler of patent medicines, a mousy bank clerk quits his job, withdraws all his money, makes ready to go to California, and falls for a girl who may endanger what time he has remaining.
Searching for the third key, Ian and Barbara meet with the sinister trapper Vasor before following Susan and the others into a cave system guarded by the mysterious Ice Soldiers.
A World War II veteran and a Japanese-American gardener battle each other over a war that ended more than 20 years ago.
A kidnapping hoax leads to murder when the ransom note gets into the wrong hands.
Granny is waking up the family so they can get to their new store: The House of Granny. Jethro wakes up sleepy, not wanting to be up, but as soon as Granny mentions breakfast, he is dressed in a split second. Jed is carving a Y in the kitchen, and when Jethro sees the shavings in the bowl, he thinks it is cereal. Jed tells him to have corn flakes instead. Granny goes to wake up Elly May, saying that her store opens at a decent hour—the crack of dawn!
A government agent faces a crisis of conscience when he infiltrates a band of aliens marooned aboard the wreckage of a flying saucer.
After Barney sees Andy and Helen kissing in a jewelery store, he becomes convinced they are secretly engaged and decides to throw a surprise engagement party, much to the chagrin of the un-engaged Andy and Helen.
After a triumphant tour in Europe, a famous Negro singer encounters racial prejudice in Virginia City when he arrives for a concert.
Henry Huckaby, a local farmer and fed up with a sore back and an empty belly leaves to seek his fortune in Dodge. After several failed ideas he hits on one that may make him rich but could also cost him his life.
The search for the second key takes the travellers to a jungle where Ian and Barbara come under threat from rapidly growing plants.
Bob and Millie wake up to find they are in a strange town. Everything appears to be props - trees, animals even cars.
Mr. Drysdale buys the Clampetts a dress store using their money, and the clan decides to check it out. When they arrive at The House of Renee, they are mistaken for poor and Renee tries to help them. She thinks they need jobs. However, the Clampetts think Renee and her models are poor and starving. Renee gives the Clampetts money for food, and they think it is for them to buy food for Renee.
A discarded photograph, with Kimble in the background, leads Gerard to Chicago where he assembles a team of detectives where they trap Kimble within an eight-block radius of the city. With Kimble wondering from place to place, and being recognized by whomever he comes into contact with, he flees from both policemen and local citizens, finding refuge in a small house which is the home of two middle-aged men, named Jake Devlin and Sam Reed, whom have long argued over his innocence.
An accident in a nuclear research facility opens a dimensonal doorway and allows deadly creatures to emerge.
Everybody's favorite Englishman Malcolm Merriweather stops by Mayberry once again. This time he's having trouble finding money to finish his bicycle tour of America. Andy decides to hire him to help Aunt Bee around the house, but Malcolm only succeeds in making her feel useless.
Mateo Ibara and his wife Carla visit the Ponderosa. Ibara asks Will to return to Mexico with him. Ibara and Will fought together for Juarez's cause and Ibara saved Will's life. For this reason, Will feels obligated to Ibara, but Ben is suspicious of the man's motives.