Supernatural (4.19): Jump the Shark

Sam and Dean are on a hunting trip when they come across a guy named Adam Milligan. Later they find out Adam was conceived when his mother fell in love with a hunter who just so happens to have been John Winchester.

Air Date: Thursday, April 23, 2009

• A 19-year-old boy named Adam (guest star Jake Abel) calls Sam (Jared Padalecki) and Dean (Jensen Ackles) looking for John Winchester, claiming to be his son.? Dean and Sam meet Adam, assuming he's a demon trying to lure then into a trap.? However, they find out that John was indeed the boy's father and Adam tells them of his "normal" upbringing, which infuriates Dean. Phil Sgriccia directed the episode written by Andrew Dabb & Daniel Loflin (#3T7519).
• Word is that those who think they have Sam and Dean all figured out by now will be rather surprised by their individual reactions to the introduction of their "new brother," Adam. Also in that April 23 outing: Only the most eagle-eyed will spy a wink-nudge "tribute" to the late Kim Manners. Source: TV Guide Online
• Is there a third Winchester sibling among us? It certainly would seem so, and Jake Abel (Threshold) is playing him, TVGuide.com has learned exclusively. Abel has been cast on the CW's Supernatural as Adam Milligan, an 18-year-old whom Sam and Dean meet in an episode titled "Jump the Shark" and airing April 23. Adam, viewers will learn, is the by-product of a little somethin'-somethin' that big daddy John enjoyed during one of his demon hunts. Upon eventually being told by a onetime paramour of Adam's paternity, John paid the lad the occasional visit. Never, though, did John alert Sam and Dean to Adam's existence, nor vice versa. Source: TV Guide Online [Note: It is possible the episode will air before April 23.]