On this episode of Supernatural…
Sam and Dean investigate a confederate soldier ghost with a grudge.
They run into Garth, who has been filling in for Bobby.
Sam has flashbacks of Amelia and the two being about to talk about their lost loved ones.
Dean, taken over by the ghost, is enraged that Sam didn't look for him. Garth stops Dean and is able to destroy the penny that possesses the spirit because he has no issues with anyone.
Sam tells to Dean to stop getting mad at him and that he might be the hunter who kills Benny.