Harold: You owe it to this kid to perform whatever miracle you've got up your sleeve. You owe it to Colin, and to his parents, and to my brokenhearted daughter, and to the universe or whoever decided that you would be Leonardo, and I would be… less remarkable. Hell, you owe it to me.
Amy: Doctor Brown is one of the premier brain surgeons in the United States, patients fly halfway around the world for a consultation and we have him--right here and he wants to help us.
Mrs. Hart: No, no he doesn't. We agreed that Colin should have the surgery and it was Doctor Brown who changed his mind.
Bright: I've got one shot at Jemma Casswell, and Mom's tuna cornflake casserole is not gonna seal the deal.
Edna: If you wanna see him, I gotta have reason. You could be the Unabomber for all I know.
The Unabomber was the nickname of Ted Kaczynski, a murderer who sent bombs in the mail to various people over a span of 18 years.
Episode Title: The Doctor Is In
The episode title is a reference to the Peanuts comic strip with Lucy and her famous psychiatric help booth where she would hang her "The Doctor is In" sign up when she was available.