Patrick Cassidy

Castle and Beckett find themselves in flashback mode to the 1940s.

The Major Crimes unit must find the culprit when two people are brutally attacked with a pair of scissors at a teen party, Provenza meets someone who will change his life.

A woman claims to be Clark's mother, prompting the Kents to reveal what happened the fateful day they found their adopted son in a cornfield.

When Lionel is shot in the manor, Jonathan is arrested. Clark and Pete suspect that others, including Lex, may be involved, and try to find out who pulled the trigger.

Abby checks out of rehab and returns to the ER; multiple victims of a fire are brought in; Harold finds new confidence.

Clark falls headlong into a cave, where he finds a beautiful girl and a wall inscription with the key to his origins.