4x130 - Late Show with David Letterman

""How Many Guys in a Bunny Suit Can Get Into H&R Block?"" Only two, until both are kicked out. Right after the first commercial break, Biff then tries to get in wearing a dog suit and, despite being escorted by Bill DeLace, is also ejected. When all is said and done, Dave announces the tax company's new slogan: ""And stay out!""