An ordinary trip to the mall gets a little wacky when the group goes their separate ways. Trying to impress Cousin Leroy, Leonard agrees to get a matching tattoo. Afraid of needles, Sheldon decides to hit up the arcade where he causes a ruckus over the Star Trek: The Next Generation Pinball machine’s continuity errors. At the food court, Penny tries to convince Howard to ask out the young woman at the cookie store. Amy’s mysterious absence from work causes the police to begin an investigation.