John makes a passionate speech to the state of Montana, a formidable new opponent from Market Equities arrives on a private jet, and the cowboys on the Yellowstone deal with…

Sam treats an abused, pregnant teen. Dr. Carter introduces African girlfriend Makemba to wintertime. ER chaos shocks a risk-assessment expert. Dr. Pratt and Abby restrain a man who has tuberculosis.

When the CSI team investigates the brutal murder of a family, they trace the killer to the house next door, which might belong to the “Dr. Jekyll” serial killer.

Melinda help Eli with a patient who is being haunted by his sister. Meanwhile, Jim and Melinda have concerns over something Aiden has been seeing.

Sheldon goes head-to-head with Wil Wheaton for the role of the new Professor Proton. Also, Penny steps in to take care of Halley when Bernadette and Howard both wind up…