Harry promises everyone a night out to a taping of The Tonight Show with Johnny Carson and Ed McMahon. When they discover Harry's tickets were for the previous week, Lucy sneaks everyone into the audience.
Lucy appears on Johnny Carson's show and ends up winning the "Stump the Band" contest with her childhood lullaby "Snoops the Lawyer". Lucy and Harry win a free dinner at the Brown Derby.
Unfortunately for Johnny Carson, Lucy and Harry coincidentally dine at the Brown Derby the same time as Carson and McMahon are also dining. Naturally, Lucy believes she must have won a dinner with Johnny and Ed and crashes their table. Chaos follows leading the trio (all but Lucy) to escape while she chases a celebrity on the other side of the restaurant.
Special Notes: Lucille's Mom, Dede Ball, is in the Tonight show audience and featured on camera with Johnny. The entire Brown Derby bit, with the waiter spilling drinks on Carson, is stolen right from the I Love Lucy episode #114, "L.A. at Last!".