I remember on one episode, Jethro was going to hold a séance, in order to contact the spirit world.
Miss Jane: “Jethro, you’re not a medium!”
Jethro: “I know, I’m an extra large!”
Miss Jane. Hmm....
Miss Jane: Jethro, youre not a medium!
Jethro: I know, Im an extra large!
There are so many wonderful episodes to quote from. One of my favorites is when Jethro bought a rocket, strapped a saddle onto it, loaded it with granny's moonshine and launched himself to the moon.
The next scene showed a helicopter lifting him out of the ocean and his first words were "Hey! Where's all the moon maidens?!"
I could cite several scenes from various episodes by memory. That show was absolutely hilarious.