Leonard and Sheldon hire the host of their favourite childhood TV show to perform.
The 118 faces emergencies at a spin class and a hair salon; a husband and wife find themselves in a compromising position; Buck discovers new cognitive abilities; Hen and Karen find out Denny has been seeing his biological father.
Patrick Jane and the CBI team are pulled deep inside the world of horse racing after a jockey is found murdered and suspects abound.
Olivia must protect a new client who is under investigation; Quinn runs into trouble.
Olivia and the team rally when Quinn finds herself in a tragic situation; Cyrus turns to Olivia when an announcement affects Fitz's presidency.