Episode 11: Appointment — In Samarra

: Despite Dean failing the 24-hour test, Death retrieves Sam's soul anyway, noting that he wants the Winchesters to continue investigating "souls" and Purgatory. He places a "mental wall" in Sam's mind to block the memories of Hell. Key Characters & Guest Stars

: Sam does not want his soul back because of the trauma it suffered in Hell. He attempts a "soul-proofing" ritual provided by Balthazar that requires the "blood of the father." Since John Winchester is dead, Sam targets Bobby Singer. Episode 11: Appointment in Samarra

: Sebastian Roché assists Sam in his attempt to remain soulless. : Despite Dean failing the 24-hour test, Death

: Dean fails the challenge after sparing a young girl's life, which causes a ripple effect of unintended deaths. This teaches him that the natural order cannot be subverted without consequences. He attempts a "soul-proofing" ritual provided by Balthazar

: Julian Richings returns in his iconic role as the Horseman.

: Dean strikes a bargain with Death (Julian Richings). If Dean can act as "Death" for 24 hours without removing his ring, Death will retrieve Sam's soul from Lucifer’s Cage.