"I know you will," she responds softly. She's absolutely certain. She trusts Sherlock and Ted with her life. It's unfortunate that happens to be literal in this case, but that doesn't make it any less true.

She looks at the doctor. "Dilantin?"

"Actually I was thinking Keppra. Less initial titration."

Joan nods. "That makes sense." She looks back at Ted, giving him a small smile and squeezing his hand. "It's going to be okay."