Despite his skepticism, Alvin's conned into becoming a movie star by Harry who claims Dave's broke and plans to sell the house. Dave, Simon, and Theodore hold an audition, but they realize nobody can replace Alvin. Meanwhile, Alvin is playing in a pirate movie, missing his brothers and Dave. When he finds out Harry's not sending Dave's checks and realizes Dave was never broke, he decides to make a "scene they'll never forget." Simon and Theodore ponder the good times with Alvin, compelling them to visit him. They disguise themselves as extra and watch Alvin destroy the set before swinging in to save him. Harry and Mr. Buckner are throw overboard and chased by a shark. Once home, Alvin's surprised to see all his stuff is packed and driving away for charity.
- "Breaking up Is Hard to Do" originally performed by Neil Sedaka.
- The title is a pun on the saying, "Lights! Camera! Action!" and Dave's catchphrase when he yells, "Simon, Theodore, ALVIN!!"
- This is the third appearance of "Uncle" Harry.