Sister Mary Eunice is terrified to discover a dark angel has descended on Briarcliff. Kit makes a bold move to be reunited with Grace.

Oliver encounters a mysterious woman, Helena Bertinelli, daughter of mob boss Frank Bertinelli, who he can finally be himself with, but he soon comes to realize she’s hiding dangerous secrets of her own. Helena is on her own personal mission of vengeance and Oliver is caught in the middle. Meanwhile, Tommy is blindsided by an unfortunate turn of events and turns to Laurel for support.

An attendee at a popular motivational-speaker's conference in Seattle is murdered and the speaker himself disappears soon afterward. Meanwhile, Garcia is puzzled when Morgan refuses to attend a dinner honoring an old family friend.

The CSI team lends a hand to local law enforcement on the strip with several arrests until a John Doe is found in car. Also, things become personal for Captain Brass when he discovers some facts about his daughter.

Skethces include an alien learning about the female anatomy; the guys one-upping each other with their fresh hatz; meeting the last two men on Earth.

Mitch and Cam try to save an old tree in the park; Jay takes Manny to a kid’s Olympics-themed birthday party; Gloria and Claire have an eventful shopping trip.

Marshall Evans continues to pressure Rayna and Juliette to collaborate at an event at the Ryman theater, Teddy is forced to reveal the truth to Rayna when Peggy's desperation hits its peak, and in an effort to move past her failed relationship with Avery, Scarlett finds herself getting closer to Gunnar.

Castiel tells Sam and Dean that he’s decided to become a hunter like them. Sam and Dean aren’t sold on the idea but agree to investigate a case Cas found where a man’s heart literally burst through his chest. The guys discover there has been more than one odd murder in the small town and all of them resemble cartoon deaths.

Powerball sales skyrocket, Fox News explains why women can't get married, Harry Reid tries to curb filibusters, and Frank Oz talks Muppets.

Comic Lewis Black; from "Doctor Who (2005)", actress Karen Gillan; musical guest L.P. performs.

The chefs must work with two slabs of beef. Later, they reinvent a 1950s menu and serve up classic fare.