| # | Title | Written by | Directed by | Airdate | Prod.code |
|---|---|---|---|---|---|
| 251 | "The Pollution Solution" | Paul Henning and Dick Wesson | Bob Leeds | September 15, 1970 | 9-1 |
| The Clampetts travel to Washington DC to give their fortune to the President to fight the smog problem. (This is the first time an "edited" version of the opening credits, without the ballad, is aired). | |||||
| 252 | "The Clampetts in Washington" | Paul Henning and Dick Wesson | Bob Leeds | September 22, 1970 | 9-2 |
| The con artists follow the Clampetts to Washington, and sell them the White House. | |||||
| 253 | "Jed Buys the Capitol" | Paul Henning and Dick Wesson | Bob Leeds | September 29, 1970 | 9-3 |
| Jed gets swindled into buying the Capitol Building and the Clampetts are taken to a psych ward for evaluation. | |||||
| 254 | "Mark Templeton Arrives" | Paul Henning and Dick Wesson | Bob Leeds | October 6, 1970 | 9-4 |
| Mark Templeton, a Navy frogman, arrives to court Elly May, but Granny misunderstands his profession and thinks he is half-human, half-frog. | |||||
| 255 | "Don't Marry a Frogman" | Paul Henning and Dick Wesson | Bob Leeds | October 13, 1970 | 9-5 |
| Granny puts her medical knowledge to work trying to figure out a cure for being half-frog. | |||||
| 256 | "Doctor, Cure My Frog" | Paul Henning and Dick Wesson | Bob Leeds | October 27, 1970 | 9-6 |
| Granny is alarmed that Elly May and Jethro want to be frogmen like Mark. | |||||
| 257 | "Do You Elly Take This Frog?" | Paul Henning and Dick Wesson | Bob Leeds | November 10, 1970 | 9-7 |
| Granny is desperate to keep Elly May from going into the water with Mark, believing she too will turn into a frog. | |||||
| 258 | "The Frog Family" | Paul Henning and Dick Wesson | Bob Leeds | November 17, 1970 | 9-8 |
| To add to Granny's distress, Jed decides he too would like to be a frogman. | |||||
| 259 | "Farm in the Ocean" | Paul Henning and Dick Wesson | Bob Leeds | November 24, 1970 | 9-9 |
| Mr. Drysdale and Granny team up to run the frogman away from Elly May | |||||
| 260 | "Shorty to the Rescue" | Paul Henning and Dick Wesson | Bob Leeds | December 1, 1970 | 9-10 |
| Shorty Kellems returns to help Granny with her frogman problem. | |||||
| 261 | "Welcome to the Family" | Paul Henning and Dick Wesson | Bob Leeds | December 8, 1970 | 9-11 |
| Granny's latest idea is to get Mark uninterested in Elly May by having the girl cook for him. | |||||
| 262 | "The Great Revelation" | Paul Henning and Dick Wesson | Bob Leeds | December 15, 1970 | 9-12 |
| Granny finally grasps that Mark is not half-frog, and wants him to date Elly May, but Mr. Drysdale makes the Clampetts believe that the Navy needs Mark due to an imminent invasion of grunion. | |||||
| 263 | "The Grunion Invasion" | Paul Henning and Dick Wesson | Bob Leeds | January 5, 1971 | 9-13 |
| The Clampetts decide to defend their country against the invaders from the island of Grun, so they head to the beach. | |||||
| 264 | "The Girls From Grun" | Paul Henning and Dick Wesson | Bob Leeds | January 12, 1971 | 9-14 |
| The bank's secretaries form a union called GRUN, leading the Clampetts to believe that the grunions are solely female. | |||||
| 265 | "The Grun Incident" | Paul Henning and Dick Wesson | Bob Leeds | January 19, 1971 | 9-15 |
| Granny and Elly May are sympathetic to the secretaries' plight. | |||||
| 266 | "Women's Lib" | Paul Henning and Dick Wesson | Bob Leeds | January 26, 1971 | 9-16 |
| Elly May and Granny join the women's liberation movement, leaving Jethro and Jed to fend for themselves. | |||||
| 267 | "The Teahouse of Jed Clampett" | Paul Henning and Dick Wesson | Bob Leeds | February 2, 1971 | 9-17 |
| A group of Japanese girls arrive at the mansion to help with the housework. | |||||
| 268 | "The Palace of Clampett San" | Paul Henning and Dick Wesson | Bob Leeds | February 9, 1971 | 9-18 |
| The girls want to teach Jed, Jethro, and Mr. Drysdale a lesson because of their luxurious lifestyle at the mansion. | |||||
| 269 | "Lib and Let Lib" | Paul Henning and Dick Wesson | Bob Leeds | February 16, 1971 | 9-19 |
| The Clampetts have a hard time adjusting to life back together in the mansion. | |||||
| 270 | "Elly, the Working Girl" | Paul Henning and Dick Wesson | Bob Leeds | February 23, 1971 | 9-20 |
| Elly May gets a job at the bank as a secretary. | |||||
| 271 | "Elly, the Secretary" | Paul Henning and Dick Wesson | Bob Leeds | March 2, 1971 | 9-21 |
| A girl from back home arrives to try her hand at the movies, but Jethro fears she wants to marry him. | |||||
| 272 | "Love Finds Jane Hathaway" | Paul Henning and Dick Wesson | Bob Leeds | March 9, 1971 | 9-22 |
| A man pretends to be an Audubon so he can use Miss Jane to get to Elly May. | |||||
| 273 | "The Clampetts Meet Robert Audubon Getty" | Paul Henning and Dick Wesson | Bob Leeds | March 16, 1971 | 9-23 |
| "Audubon" pretends to be a Getty when meeting Mr. Drysdale and a Crockett when meeting the Clampetts. | |||||
| 274 | "Jethro Returns" | Paul Henning and Dick Wesson | Bob Leeds | March 23, 1971 | 9-24 |
| The elaborate fraud is unravelled as everybody learns that "Audubon" is just a starving actor. (Series Finale) | |||||