Angels try to prevent Sam's conception

BURBANK, Ca (CW) - Don't miss this Thursday on the CW: SUPERNATURAL at 9/8c following THE VAMPIRE DIARIES at 8/7c!!

Supernatural The Song Remains the Same (HD, Repeat, TV14) The angels attempt to stop Sam from being conceived, but Castiel sends the brothers back to thwart them and Sam and Dean meet their parents.