NBC (Wed., April 18, 10 P.M. ET)
Comedian Jerry Seinfeld acts as spokesman for the humor magazine in a mock-scientific—actually a mock-everything—look at the phenomenon of celebrity. It begins funny with such gambits as a lab experiment that uses an overhead camera to record what happens to a roomful of tourists when Ricardo Montalban enters the environment. But before the hour is over, the jokes have become tiresome and even cruel. The barbed, satirical tone does make this a unique proposition, a reminder of how bland and inoffensive most tube wit is.