S7, E11: Still reeling after what happened to Bobby, Dean becomes dangerously obsessed over finding a way to take down Dick Roman (guest star JAMES PATRICK STUART). Meanwhile, Sam decides to help a teenage girl (guest star MADISON McLAUGHLIN) look for her father (guest star IAN TRACEY), a hunter who has gone missing. Sam traces his last steps to a truck stop where the help (guest star MEGHAN ORY) turns out not to be so friendly.