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.
Harriette gets jealous when Carl goes on a lengthy stakeout with a policewoman.
Carl charges an arrogant celebrity with assault after losing patience.
Laura sells the priceless quilt Grandmother Winslow considered an heirloom.
Laura needs a date for the dance; Eddie asks one of his friends and Carl asks Steve Urkel.
The children bring home a stray dog that has a habit of chewing on things.
The family works hard to fill an order for thousands of Carl's lemon tarts.
Carl decides to lose weight before going to his high-school reunion.
Eddie pushes Laura to date his creditor, Steve Urkel.