Actress Adelaide Kane; guest comic Jeff Davis.

Guest comic Keegan-Michael Key.

Actor Jaime Camil; guest comic Jeff Davis.

Actor Scott Porter; guest comic Greg Proops.

Reality-TV star Willie Robertson ("Duck Dynasty"); guest comic Jeff Davis.

Actress Heather Morris; guest comic Brad Sherwood.

San Francisco 49er Vernon Davis; guest comedian Keegan-Michael Key.

Guest comic Jeff Davis.

Illusionists and entertainers Penn & Teller; guest comedian Gary Anthony Williams.

TV host Kathie Lee Gifford; guest comedian Brad Sherwood.

Retired mixed martial artist Randy Couture; guest comedian Jonathan Mangum.

Guests: Actress Gina Rodriguez and comedian Jeff Davis. Games played: Weird Newscasters, Duet, Themed Restaurant, Scenes from a Hat, and Helping Hands.

Guest: Comedian Gary Anthony Williams. Games played: World's Worst, Whose Line, Irish Drinking Song, Props, Doo Wop, and Greatest Hits.

Guests: Supermodel Nina Agdal and comedian Heather Anne Campbell. Games played: World's Worst, Song Styles, Dead Bodies, Scenes from a Hat, and Helping Hands.

Guest: Comedian Brad Sherwood. Games played: Let's Make a Date, Props, Secret, Scenes from a Hat, and Greatest Hits.

Guests: Science guy Bill Nye and comedian Greg Proops. Games played: Weird Newscasters, Newsflash, Song Styles, Scenes from a Hat, and Helping Hands.

Guest: Comedian Keegan-Michael Key. Games played: Hollywood Director, Scenes from a Hat, Whose Line, Hats/Dating Service Video, and Greatest Hits.

Guests: TV host Carson Kressley and comedian Heather Anne Campbell.

Guest: Comedian Jeff Davis Games played: Scenes from a Hat, Whose Line, Forward Rewind, Newsflash, and Greatest Hits.