Carter investigates an unusual car accident. Meanwhile, Stark, under the stress of completing a project on time, pressures two research teams to produce results.

While MacLaren, Carly, Trevor, and Philip work with another traveler team to protect a child important to the future, Marcy takes measures to remember her past life – but uncovers…

Emma, Henry and Mr. Gold search for Gold’s son in New York; Hook, Cora and Regina look for one of Rumplestiltskin’s most precious possessions.

Sam and Dean investigate a brutal death and discover that the killer is a lycanthrope: a werewolf.