Leiner died Thursday at his home in Los Angeles after a long battle with cancer, his brother, Ken, told The Hollywood Reporter.
Leiner also helmed episodes of such series as The Sopranos, Sports Night, Strangers With Candy, Arrested Development, The Office, Felicity, Everwood, Gilmore Girls, Freaks and Geeks, The Mind of the Married Man, The Tick and Party of Five.
More recently, he directed and produced the Joshua Malina comedy Backwash at Crackle for Sony Pictures Television.
Dude, Where's My Car? (2000), starring Ashton Kutcher and Seann William ...