Watch First Impressions Online at Couchtuner. USA Network’s unscripted competition series, First Impressions, is a weekly half-hour competition that features Emmy Award-Winner and “SNL” Alum Dana Carvey and is hosted by Freddie Prinze Jr. (“Star Wars Rebels”). Carvey is the “expert-in-residence” in the comedic series that pits America’s best amateur impressionists against each other in a battle of celebrity impression. Each week a winner will be crowned.