Red Sky at Morning (S03E06)

Sam and Dean investigate the mysterious demise of drowning victims who were nowhere near water at the time of their death. The brothers learn that each of the victims saw a ghost ship shortly before they died. Upon investigation, Sam and Dean cross paths with Bela (recurring guest star Lauren Cohan), who is being paid handsomely by one of the murder victim's family members to solve the case. The guys warn her to stay out of their way, but she has other plans. (Warner Bros. UK)