The Final Episode

[Johnwiley]

The final episode called "Isn't It Romatic" on July 20, 1991
where Mark & Willie at the mall and kidnapped sister.

[boechsner]

Nope. On July 20, 1991, CBS aired the final two episodes back to back. At 7:00 Central Isn't it Romantic aired followed by Ho, Ho, Hogans airing at 7:30.

Ho, Ho, Hogans was the last episode that aired. It did not air in December 1990, like some assume. The series went on hiatus after the episode that aired on December 1, 1990 which was The Best of Friends, the Worst of Times.