Ratzenberger, who starred as Cliff Clavin, had noticed an audience member fixated on Shelley Long and Ted Danson during a taping ... and this guy's looking where the actors are standing off ...

Woody Harrelson landed his Cheers part — and his big break — thanks in part to costar Ted ... told Danson. “I remember very well you said, ‘I know you think you've got your guy, but ...