We have the synopsis for Supernatural season 15 episode 12.
 
SUPERNATURAL
“Galaxy Brain” — (8:00-9:00 p.m. ET) (TV-14, LV) (HDTV)

KIM RHODES RETURNS AS SHERIFF JODY MILLS – Sam (Jared Padalecki) and Dean (Jensen Ackles) respond to a frantic call and together along with Castiel (Misha Collins), Jack (Alexander Calvert) and Jody (guest star Kim Rhodes), assist in an extraordinary and heartbreaking rescue. Billie (guest star Lisa Berry) surprises everyone with a visit to the bunker. Richard Speight, Jr. directed the episode with story by Meredith Glynn & Robert Berens and teleplay by Robert Berens (#1512). Original airdate 3/16/2020.

Source:

CW

 
We're hitting the home stretch. Jody is in trouble. How heartbreaking will this rescue be? What does Billie want at the bunker? Give us your thoughts in the comments or in the discussion thread for episode 12.