Time Is On My Side

S3 E15: As time runs out for Dean, Sam convinces him to head to Erie, Pennsylvania, to investigate a possible zombie case. Instead, they discover Doc Benton (guest star Billy Drago - "Charmed"), a real-life doctor who, in 1816, abandoned his medical practice to follow his obsession with finding the key to eternal life by drugging people and stealing their vital organs. Meanwhile, Bobby (recurring guest star Jim Beaver) finds out where Bela (recurring guest star Lauren Cohan) is hiding, and Dean heads out to confront her, leaving Sam behind to deal with the good doctor. Dean and Bela battle it out for the last time, and Dean leaves Bela in a desperate, possibly fatal, position.