The plot synopsis hints that the angel-turned-human will be investigating a case.
CASTIEL GETS A JOB — Castiel (Misha Collins) gets a job at a Gas-N-Sip and actually starts to enjoy life as a human. A headline in the local newspaper about some disappearances in the area catches his eye, so he calls Dean (Jensen Ackles) to help him investigate the case. Dean knows he needs to keep Sam/Ezekiel (Jared Padaleck) away from Castiel, so he tells Sam that he and Kevin (guest star Osric Chau) need to stay and work with Crowley to decipher the tablet. Crowley agrees to help Sam and Kevin but in return he wants one phone call to hell. Rob Spera directed the episode written by Robert Berens (907).
In the past, Castiel has proven to be a dedicated hunter with questionable methods. What do you think will be the outcome of his efforts?