The episode ends not with a punchline, but with a quiet moment. Sheldon, defeated by math, sits on the couch. Missy returns from her date, buzzing with excitement. She asks him what’s wrong. He says, “I couldn’t figure out the black hole.” She says, “That’s okay. There’s always tomorrow.”

: Ed Begley Jr. returns as Dr. Linkletter, and Melissa Peterman appears as Brenda Sparks.

Episode Overview: " A Box of Treasure and the Meemaw of Science "