Time after Time, 7x12, Supernatural.
Sam and Dean tangle with the God of Time (guest star Jason Dohring), who sends Dean back to 1944, where he is immediately arrested by none other than the one and only Eliot Ness (guest star Nicholas Lea). While trying to figure out how to retrieve his brother, Sam is surprised by the reappearance of an old friend.
[What Sam says is entirely in jest. Sorry for rubbish quality and lack of updates in the past few days. Hopefully will be back on track soon!]