We have the synopsis for Supernatural season 14 episode 16.
 
SUPERNATURAL
“Don’t Go In The Woods”— (8:00-9:00 p.m. ET) (Content Rating TBD) (HDTV)
WHISTLING IN THE DARK – Sam (Jared Padalecki) and Dean (Jensen Ackles) are baffled when they come up against a monster they have never heard of before. Jack (Alexander Calvert) does his best to impress a new group of friends. John Fitzpatrick directed the episode written by Davy Perez & Nick Vaught. (#1416). Original Airdate 3/21/2019.

Source:

The CW

 
Sam and Dean are hunting together? What kind of monster could be so unique that they never heard of it before? Who are Jack's new friends and how far will he go to impress them? Let us know in the comments or in the discussion thread for episode 16