02/21/2013 12:18 pm ET

'1600 Penn': Bruce Campbell And Josh Gad Compare Elvis Impressions (EXCLUSIVE VIDEO)

On tonight's "1600 Penn" (9:30 p.m. EST on NBC), genre icon Bruce Campbell guest stars as President Gilchrist’s (Bill Pullman) brother, Doug. His visit to the White House ignites a long-standing rivalry which threatens their relationship and prompts Emily (Jenna Elfman) to take on the role of peacemaker.

Elsewhere, Becca (Martha MacIsaac) prepares for an interview and Skip (Josh Gad) decides to offer his own special version of the White House tour after witnessing one from an official tour guide (guest star Rory O’Malley).

To whet your appetite for Campbell's "1600 Penn" appearance, HuffPost TV has an exclusive first look at the show's latest "At the Monitors with Josh Gad" webisode, which features Gad and the "Bubba Ho-Tep" star comparing the finer points of celebrity impressions. Naturally, when faced with the might of Campbell's Elvis impersonation, Gad gets a little confused ...

"1600 Penn" airs Thursdays at 9:30 p.m. EST on NBC.

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