Laura doesn't want Stefan to change anything about himself for her, while Urkel - as his nerdy self - is a 10 in Myra's eyes. Meanwhile, hoping to improve his vision, Carl steps into Urkel's transformation chamber.
On a dark and stormy Halloween night Winslows play Pass the Ghost Story, in which Carl and Harriette are 19th-century vampires licking their chops over the wayfaring Sir Steven (Urkel).
Duffer Carl is reluctant to stand up to his cheating boss during a round of golf, but Harriette isn't reluctant to go looking for Laura when she misses her curfew.
It's no secret that Urkel is deathly afraid of the water and his heart sinks when he learns that he can't graduate from high school unless he can pass a pass a swimming test, so he asks Carl for lessons.
Urkel's life flashes before him atop Paradise Bluff, where Myra hands him an ultimatum; and Harriette rates her mate and finds Carl needs to spice up his technique - at barbecuing.
Carl loses points with Capt. Savage by telling him the truth about the woman he loves; and Eddie and Urkel cook up a lie about Waldo's midterm baking project, which they devoured.
Urkel sets an example of forgiveness after getting harassed by a gang of ruffians at school - when he discovers the ringleader has leukemia, he organizes a bone marrow drive; and a police-auction bargain overshadows Carl's good judgment.
The transformation machine turns Urkel into a karate master who defends Laura's honor at a rough longshoreman's bar; Waldo becomes Carl's substitute son when Eddie starts taking his father for granted.
Urkel and Carl risk their lives to save the distraught Mr. Looney from committing suicide when he is jilted on his wedding day; meanwhile at home, Laura fumes when her parents are more protective of her than of Eddie.
Another transformation-chamber mishap turns Urkel into a gyrating Elvis with a hunka hunka lot of explaining to do during a meeting with an MIT recruiter (Kline).
Suspicions mount for Myra as Urkel and Laura put their heads together to plan a surprise birthday party for her. Meanwhile across town, Richie hopes to impress his classmates on a field trip to Carl's office at the police station.
Carl and Harriette send Laura off unchaperoned to cheerleading championships in Omaha where Laura's handsome partner Gary looks a lot like trouble in Urkel's spying eyes.
