The Psychic Vortex

Summary
Sheldon and Koothrappali attend a university mixer, with Sheldon as Raj's wingman. Sheldon only went because Raj bribed him with a Green Lantern lantern, which Sheldon brought with him to the mixer. They meet a couple of women, including Abby (Danica McKellar), who take a liking to the guys. They end up playing Rock Band at Sheldon's place. For a second date, Raj bribes Sheldon with his pair of Hulk hands, signed by Stan Lee. Meanwhile, Leonard and Penny go on a double date with Howard and Bernadette, and Leonard is upset to discover that Penny believes in psychics. Later, Howard shows Leonard that he will have to accept that people are different if he wants to be in relationships.

Title reference: Penny's belief in psychics.