The Flintstones

Dr. Sinister (5x8)

Air date: Nov 05, 1964

Fred and Barney are suddenly thrust into an international spy plot involving a mysterious stranger who passes them an envelope, then beautiful spy Madame Yes, and Dr. Sinister, a villain who seeks world power. The two escape the villains and their nefarious plot, but once home, their wives refuse to believe the wild tale.