A spin-off sitcom from Happy Days, along with Laverne And Shirley and Joanie Loves Chachi.
Starred Robin Williams as a manic alien who acts pretty much like Robin Williams does normally.
None of the other characters was that interesting apart from a mad preacher Exidor (Robert Donner) who had imaginary followers.
Pam Dawber was Mindy.
3rd Rock From The Sun pretty much covers the same ground today.