Felicia Day's Charlie will return from Oz with a new problem. Supernatural's Charlie Bradbury won't be 100 percent alone when she returns from Oz.

Staring Misha Collins, episode 1009 will feature a surprising storyline. Supernatural is currently shooting for a particularly "odd" season 10 episode.

The Mark of Cain could become even worse for Dean. Supernatural's Dean needs to feed the Mark of Cain or risk becoming even more demonic, but the elder Winchester doesn't want any part of it.

Kate will return to 'Supernatural' in season 10. Supernatural will get a blast from the past when Kate the werewolf returns. Dean & Crowley's Partnership 'Put To The Test' On 'Supernatural', Alliance To Continue After Cure? Kate (Brit Sheridan) first appeared in season 8's found footage episode, "Bitten.