Whose Line Is It Anyway?

Greg Proops hosts a crazy party that includes amorous Southern sheriff Ryan. The Vampire Diaries' Kat Graham does a flamboyant musical and the others wear hats that are too small.

Olympic skater Tara Lipinski gets played like a violin and used as a porthole. Keegan-Michael Key also joins in and Little Red Riding Hood gets the Hollywood Director treatment.

Verne Troyer becomes props like a mine cart for Indiana Jones. As a baby looking for the perfect breast, Ryan eyes Nyima Funk. Ryan and Colin are dentist-and-assistant fighting robots.

Greg Proops helps welcome Glee's Darren Criss, who becomes a malfunctioning robot cop trying to arrest street criminal Greg. Also, Jeff Davis and Wayne sing songs of kindergarten and pilots Jeff and Greg deal with a storm and snakes on a plane.

Michael Weatherly of NCIS portrays a drunk businessman passing through customs. Greg plays Woody Allen, Ryan impersonates John Wayne and Wayne does a dubstep hillbilly.

Sumo wrestler Byambajav Ulambayar makes Wayne "sprain his ding-a-ling" while he and Gary Anthony Williams sing. Also, "boing" becomes the word of the day and Colin has problems with flatulence as an astronaut in Sound Effects.

Nolan Gould joins Wayne as props for Colin and Greg's honeymoon trip. Twin girls help Greg and Colin defend a fort. On Weird Newscast, Wayne gathers his hillbilly family for a picture and college boy Jeff yells an order into Greg.

Hart of Dixie's Mircea Monroe joins the show to play a sexy werewolf and a Bond girl dealing with Ryan and Colin. Gary Anthony Williams returns to do the world's worst commercial. And Ryan and Colin do their Tonto and Lone Ranger routine with a friend.

Keegan-Michael Key returns and has to choose a date with fashion photographer Wayne, angry bee Ryan or former flame Colin. Also, Ryan can't move in Film Dub and Wayne delivers a baby in a car in Forward/Rewind. Wayne sings Songs of Spring Break.

Jack Osbourne becomes a rock guitarist for Ryan's band and does an "electric ballet" with Wayne. Farmer's daughter Nyima Funk flirts with farmhand Ryan and twerks with pigs belonging to her father, Wayne. Batman and Robin become Wanda and Louise.

The NFL's Rob Gronkowski joins the cast to dance between stadium rockers Wayne and Jonathan and take advice from fitness coach Ryan. Jonathan chooses a date from Chippendale wannabe Wayne, dog show judge Colin and horny moose Ryan.

Robbie Amell becomes a member of One Direction with Wayne and Jeff Davis, has Italian mother Ryan feed him (or try to) and attempts to outduel Wayne in one-handed pushups. Also, a redone and updated classic bit leaves Jeff used and abused.

Brad Sherwood helps Wayne sing to Supernatural's Misha Collins. Brad chooses a date from a mosh-pitting rock star, a multicultural chicken and a sexy helicopter pilot. Hoedown returns in cheesy fashion and Ryan and Colin go to Vegas on their motorcycles.

Sheryl Underwood joins the show to help Wayne take Ryan and pregnant Colin to a Paris hospital, while Wayne becomes the first black hunchback in Hollywood Director. Also, Wayne and Jeff take on German metal as they sing Songs of the Beach.

The wonderful-smelling Mel B becomes a patient of Ryan's hypnotist, a totem pole in the frozen north and the recipient of a strip-o-gram from Wayne and Gary. Wayne, Gary and Colin sing about a tragic shopping victim.

The Big Bang Theory's Kunal Nayyar lets Ryan teach him about women and rocks out with Wayne and Brad. Colin puts up with mail-order bride Brad, masochist Wayne and commando Ryan on the news.

In another Weird Newscast, soap opera doctor Jeff Davis tries to save Colin's life and Wayne arrests someone who gave him a joke haircut. Jeff hosts a party with Ryan the sperm and Colin the hobbit. And another album of beach songs is sold.

Padma Lakshmi lets Wayne sing to her about "chocolate pudding" and lets Ryan show her some "fancy pudding." Heather Anne Campbell flirts with mechanic Ryan to the dismay of her elderly husband, Wayne. Colin is Snow White having a drink with grumpy Ryan.

Jeff Davis chooses a date from waxer Wayne, hunter Colin and penguin Ryan. Colin reports on people cleaning themselves and Wayne goes under Aisha's desk several times. The boys and Aisha do things that shouldn't be sexy in a sexy way.

The NBA's Matt Barnes has Wayne and Gary sing to him about being invisible and works at Ryan's bar. Also, Colin's childhood bully torments him on the news, Dorothy gets pregnant in Oz and we find out what not to do with ones package.

Gary Anthony Williams returns and must choose a date from Frankenstein's monster and a giant tick. Batman and Robin have to rescue Catwoman with women's purses. And the worst presidential candidates are portrayed.

Brian Shaw, the world's strongest man, lifts various jungle animals and plays the train for Heather's engine. Heather's soap actress wants to give news anchor Colin babies. Also, what to not say to a partner's parents when meeting them for the first time.

The Goldbergs' Wendi McLendon-Covey joins the gang to play a possessed coed and be props for Ryan and Colin's new mansion. Jonathan helps Ryan find another ice hole and Colin discovers the best secret ever.

Scenes include things to not do when your partner is giving birth, a pro wrestler training, Colin reporting about worms and maggots and the album Songs of the Roommate.