HBO premieres a half-hour late night comedy series starring British chameleon Sacha Baron Cohen, who travels across America in the guise of one of three totally different characters. Cohen's primary alter-ego is Ali G, who calls himself a "hip-hop journalist," but who's really a suburban would be gangster rapper. When Cohen isn't putting Ali G and his guests in "unusual and often delightfully uncomfortable situations", he's shedding his gansta track-suit attire and slipping into the characters of two other memorable characters: Borat, a incredibly naive TV "reporter" from Kazakhstan, and Bruno, an effeminate Austrian fashion reporter.