G4 Welcomes John Barrowman, Michael Ian Black, Neal Brennan and More as Guest Hosts for "Attack of the Show!"

As summer winds down, G4's Attack of the Show! is heating up with a bevy of talented guest hosts joining Candace Bailey and Sara Underwood as your ambassadors to the information age. Each week, a new guest host will take the mantle and provide viewers with all news, laughs and reviews they need to keep a finger on the pulse of pop-culture. Guest hosts and schedule is as follows:

· Week of August 20 - Neal Brennan: comedian/producer/writer and co-creator of "Chappelle's Show."

· Week of August 27 - Michael Ian Black: comedian/producer/writer/actor and author for the upcoming book, "America, You Sexy Bitch: A Love Letter to Freedom."

· Week of September 3 - John Barrowman: Actor from the critically acclaimed Syfy original 'Torchwood' and recently announced as a cast member for CW's 'Arrow,' Barrowman hosted for G4's Comic-Con alongside Candace Bailey earlier this year.

· Week of September 10 - Kumail Nanjiani: actor on 'Franklin and Bash' and host of The Nerdist Channel's web show, "The Indoor Kids."

· Week of September 17 - Dave Holmes: comedian/host/actor who earned his hosting chops on MTV before stints on Reno: 911 and DVD on TV.

· Week of September 24 - Ben Schwartz: The infamous 'Jean Ralphio' on NBC's "Parks and Recreation" as well as a cast member for Showtime's "House of Lies."

Be sure to tune in and check out each special guest host along with Candace Bailey and Sara Underwood each week, Monday through Friday, at 7pm ET/PT.