Mister Rogers meets Lou Ferrigno on The Incredible Hulk set in 1980

The greatest crossover event in history. In episode 1468, which aired on February 6, 1980, Mr. Rogers leaves the Neighborhood of Make-Believe to hang out on set with Bill Bixby and Lou Ferrigno, stars of the TV show The Incredible Hulk. There, it became the basis of a psychological experiment helping kids get over their fear of The Incredible Hulk.