Behind the Scenes

Top image: Desi demonstrating how they film the show to the audience in one of his early "warm ups" in which he would greet and welcome the audience and introduce the cast.
Middle image: The "I Love Lucy" set when the cast went to Hollywood in the fourth season.
Bottom image: Rehearsing the first episode ("Lucy Thinks Ricky is Trying to Murder Her") with the cameras on an unfinished set (Desi is standing to the far right of the shot).