Supernatural 13×18 “Bring ’em Back Alive” Season 13 Episode 18 Inside – DANNEEL ACKLES AND RICHARD SPEIGHT JR. RETURN – Lucifer (Mark Pellegrino) rules over heaven but things aren’t going exactly as planned, exasperating his first lady, Jo (guest star Danneel Ackles). Sam (Jared Padalecki) and Castiel (Misha Collins) are perplexed by the return of Gabriel (guest star Richard Speight Jr.). Meanwhile, Dean (Jensen Ackles) gets one step closer to finding Mary and Jack. Amyn Kenderali directed the episode written by Brad Buckner & Eugenie Ross-Leming (#1318). Original airdate 4/12/2018.