Howard returns to Earth feeling dejected when he finds out that his friends are not waiting for him at the airport at the request of Bernadette, who wants to spend some quality time with him. She, however, is suffering from allergies, preventing them from spending some private time together. Howard also feels dejected when he learns that during his time away, his mother is having an affair with his dentist, Dr. Schneider and Stuart has taken over his spot in his friendship with Raj, since they are living together. Meanwhile, Sheldon, Leonard, Penny and Amy hang out at the guys' apartment and participate in a guys versus girls competition. First they are playing Pictionary and then other made-up games where the guys never seem to win.