Each episode of Geeks Who Drink features celebrity competitors. The following photos show who's on tap for this season: 

David Giuntoli of Grimm (and also Road Rules - don't front, you remember) will raise a glass (or several).

John DiMaggio is the voice of Bender on Futurama, making him the perfect celebrity to guest star on our show.

Alan Tudyk (Firefly, Serenity) will have a drink off in the name of trivia against fellow celeb...

Comedian Justine Ezarik a.k.a. iJustine.

Actor, comedian and writer, Andrew Daly (Review on Comedy Central, MAD TV) will put his pop culture smarts to the test.

Matthew MacCaull (Tomorrowland, iZombie) will swing by the neighborhood.

Dexter Darden (Maze Runner: The Scorch Trials) looks barely legal but he's over 21, we swear!

Look everybody it's super cool actress and Syfy Alum Felicia Day (The Guild, Eureka, Supernatural, Geek & Sundry).

Dominic Monaghan of Lost and Lord of the Rings fame joins the fun this summer. Peep the caption, "LOST Island Iced Teas". Ha!

Robert Kazinsky (Hot Pursuit, Warcraft) shows off his trivia skills.

Who came ready to play? Kevin Weisman (Alias, Buffy the Vampire Slayer) did by the looks of it!

We can't say for sure if 6 - er...Tricia Helfer (Battlestar Galactica, Ascension) showed up to set in her signature Cylon red dress but we're happy to see her either way.

We FOUND him! (Sorry, we had to). Harold Perrineau (Lost, Constantine) makes a toast to sci-fi.

Happy Endings' Zachary Knighton looks badass, but he's funny and good at trivia (SPOILER ALERT).

Comedian Retta (Parks and Recreation) "treats herself" to fun, booze and tons of questions.

Robert Buckley (iZombie, One Tree Hill) and his team show how alcohol really brings folks together.

Hopefully the signs are saying that Grey Damon (Aquarius) got a lot of questions right.

Hopefully Josh Brener (Silicon Valley) will make the nerdy characters he plays proud.

Brett Dalton (Agents of S.H.I.E.L.D.) and his team are on the case!

Mark Pellegrino (The Returned, Being Human, Supernatural) wants YOU to watch him be great on this season of Geeks Who Drink.

After appearing in heavy hitters like Chernobyl Diaries and Terminator: The Sarah Connor Chronicles, it's no wonder that Jonathan Sadowski needs a stiff drink.

Lenny Jacobson (Big Time in Hollywood, FL) is ready to go all in!

Sci-fi and pop culture trivia puts Eric Christian Olsen (NCIS: Los Angeles) in a festive mood.

We'll see how self-proclaimed gamer, geek and sports nerd, Scott Porter (Hart of Dixie, Caprica) measures up to his competition.