Alex D. Linz plays the adorable paraplegic boy, and you may recognize him from having starred with former ER star George Clooney in One Fine Day (1996).
Mr. Kamtovik's character is named after a high school science teacher from Fort Erie, Ontario, Canada. A childhood friend of his worked on the show and he begged to have a unique character named or based off of him.
At the end of the episode its the first time Abby and Luka kiss.