The two sets of villains are Zack and Zeke, and Stick Legs and Evil Eye.
Wilma: Fred, what's the matter?
Fred: I-I-It's finally happened, Wilma. The dream of my life has come true!
Wilma: Fred, you got a letter from Mama. She's leaving the country.
Fred: Well, no. You can't have everything.
(To Snake Legs and Evil Eye)
Barney: Say, pardon me, fellas. You guys have been following us. Who are you, anyway?
Snake Legs: We're the villains. What do we look like--boy scouts?
Barney: (about Zach and Zeke) But, I thought they were the villains.
Snake Legs: So what? Is there a law you can't have more than two villains?
This episode was recorded on 8-20-65.
Episode Title: The Treasure of Sierra Madrock
The episode title and much the story's content is inspired by John Huston's ceinematic adaptation of The Treasure of the Sierre Madre (1948), a novel by B. Traven.