Rob and Laura are trying to help Rob's visiting brother Stacey not only deal with his somnambulism - he being outgoing, exuberant and funny when he's sleepwalking, everything he's not when he's awake - but in being his somnambulist self when he's awake so that he can get work as a banjo playing comedian, which is what he wants to do after his imminent decommissioning from the army. It's especially important as Stacey has an upcoming audition for Alan Brady. Rob thinks that it may help if Stacey could actually hear a recording of himself when he is sleepwalking. And Rob thinks that a more audition friendly environment, like a party at their house, may be better than a formal audition just for Alan. Rob has first to get Alan away from his regular poker night to attend the party, and second to get Stacey to get out of his shy shell to perform magnificently for Alan all while he's awake.
—Huggo