Assassination of John F. Kennedy
At least four episodes were filmed without a live studio audience: "The Bad Old Days," which featured an extended flashback sequence that relied on optical effects that would have been impractical to shoot with a live audience in the studio; "The Alan Brady Show Presents," which required elaborate set and costume changes; "Happy Birthday and Too Many More," which was filmed on November 26, 1963, only four days after [[Assassination of John F. Kennedy|President Kennedy's assassination]]; and "The Gunslinger", which was filmed on location.