We get a glimpse of Howard's mother.
Leonard: I don't know why I avoided the Harry Potter books for so long. These are great. I just started number six.
Sheldon: That's a good one. Dumbledore dies in that one. (Leonard looks at him in shock) Yeah, I know. I didn't see it coming either.
Sheldon: Catch up on some Walking Dead?
Sheldon: Have you seen the one where Lori dies?
Sheldon: Or maybe she doesn't. Let's find out.
This episode's end titles have Chuck Lorre's Vanity Card #407.
Original International Air Dates:
Canada: February 7, 2013 on CTV
Finland: December 24, 2013 on Sub