Why Didn't They Keep Him?

We've all heard of alien abduction but how many of us have actually been abducted? According to Robbie, he's been aboard an alien spaceship...probed and prodded by aliens. He even claims they stole his memories of Shelley, his one great love (who didn't keep him either...). Hey...wait a minute...I thought this was a MOTORCYCLE show, not Aliens 'R Us...I thought Slam was the Man...WON'T ANYBODY KEEP ROBBIE????????