Which actor/actress did not appear in all 274 episodes of "The Beverly Hillbillies"?

Maximilian Adalbert Baer Jr. (born December 4, 1937) is an American actor, screenwriter, producer, and director. He is best known for playing Jethro Bodine, the dim-witted nephew of Jed Clampett (played by Buddy Ebsen) on "The Beverly Hillbillies".

"The Beverly Hillbillies" is an American situation comedy television series broadcast on CBS from 1962 to 1971. The show had an ensemble cast featuring Buddy Ebsen, Irene Ryan, Donna Douglas, and Max Baer Jr. as the Clampetts, a poor backwoods family from the Ozarks region who move to posh Beverly Hills, California after striking oil on their land. The show was produced by Filmways and was created by writer Paul Henning. It was followed by two other Henning-inspired "country cousin" series on CBS: "Petticoat Junction" and its spin-off "Green Acres", which reversed the rags-to-riches, country-to-city model of "The Beverly Hillbillies".

Jed Clampett was one of the three characters to appear in all 274 episodes of the series. The other two were Daisy May Moses (Irene Ryan), better known as "Granny" and Elly May (Donna Douglas), the only child of Jed and Rose Ellen Clampett. Jethro Bodine (Max Baer Jr.) is the son of Jed's cousin and appeared in 272 episodes.