There's Something About Mary

There's Something About Mary is the 21st episode of Season 12. It will air on May 11, 2017.

Summary
Sam and Dean are alarmed when they learn hunters are being killed by suspicious “accidents” all over the country. They decide it is best to find Mary (guest star Samantha Smith) and make sure she’s safe. Meanwhile, Toni (guest star Elizabeth Blackmore) is back in the states and she and Mary face off.

Plot
TBA.

Main Cast

 * Jared Padalecki as Sam Winchester
 * Jensen Ackles as Dean Winchester
 * Mark Sheppard as Crowley
 * Mark Pellegrino as Lucifer

Guest Stars

 * Samantha Smith as Mary Winchester
 * David Haydn-Jones as Arthur Ketch
 * Elizabeth Blackmore as Lady Toni Bevell
 * DJ Qualls as Garth Fitzgerald IV

Featured Supernatural Beings

 * Archangel (Lucifer)
 * Seraph (Castiel)
 * Crossroad Demon (Crowley)
 * Werewolf (Garth)

Continuity

 * Lady Toni Bevell previously appeared in Mamma Mia.
 * Garth Fitzgerald IV previously appeared in Sharp Teeth.

Trivia

 * The title of the episode is a reference to the movie of the same name.
 * This episode marks the first time Eugenie Ross-Leming and Brad Buckner have written five episodes for one season.