Long before mash and the west wing he starred in a failed 1966 pilot called where is everett about an invisible baby left behind by aliens who?

The show you’re referring to is "Where Is Everett?" which featured actor Alan Alda in a comical premise involving an invisible baby left behind by aliens. Despite its unique concept, the pilot did not get picked up for a series, making it one of Alda's early, lesser-known projects before he gained fame with "MAS*H" and "The West Wing." The idea of an invisible baby offered a quirky twist that ultimately didn't resonate with audiences or networks at the time.