A reluctant Laura attends a polka festival with Steve; Carl cramps Eddie's style.
Laura and Urkel postpone their wedding when they launch him into space to test his latest gadget.
The sophisticated Stefan Urquelle, alter ego of Steve Urkel, returns.
Steve's alter ego will be around permanently unless Carl can help fix the transformation machine.
Eddie and Waldo share an apartment; Steve tries to be a son to Carl.
Helping a homeless man traps Urkel and Carl in a bomb shelter.
Eddie seeks Carl's help when two cops harass him; Steve wreaks havoc at the dentist.
Laura defends Steve at school trial after lab explosion blame.
Carl experiences a nightmare in which Steve and Laura have Urkel look-alike children.
Steve and Carl end up in the ring as substitutes against Luke and Butch of the "Bushwackers" wrestling duo.
Waldo envies Eddie's scholarship; Carl fears a test he must take to get a promotion.
Urkel hiccups after thieves rob him; Laura finds romance.
Urkel tags along on Carl's camping trip; Harriette seeks a job.
Steve, Eddie and Waldo Faldo dress up as nuns and search for Myra in a convent, where she went after Steve ended their relationship.
Laura asks Steve to take more ooze juice to turn himself into the irresistible Stefan Urquelle.
Carl (Reginald VelJohnson) is not happy about his mother (Rosetta LeNoire) coming to live in his already crowded household. Guest stars: Mark Linn-Baker, Bronson Pinchot.
Harriette loses her job, forcing the family into austerity measures.
Rachel's first published short story hits too close to home for certain members of the family.
Desperate for some time alone with Harriette, Carl encourages Rachel to start dating again.
Eddie's surprise straight-A report card thrills Carl and Harriette.
Rachel and Harriette wreck Carl's vintage patrol car and must fix the car before Carl notices.
Carl and Eddie attempt to install a new shower for Grandma Winslow.