Supernatural
Season 5 Episode 13 - The Song Remains the Same
The angels send Anna back in time to kill John and Mary Winchester before they can conceive Sam knowing that if Sam was never born then Lucifer won't be able to use him as his vessel. Castiel sends Sam and Dean back to 1978 so they can stop Anna, and the two brothers are reunited with their parents. Mary recognizes Dean as a hunter since he visited her in the past once before but tries to keep the truth from John.
Episodes in Season 5
Sympathy for the Devil
42 min
Good God, Y'All!
42 min
Free to Be You and Me
41 min
The End
42 min
Fallen Idols
40 min
I Believe the Children Are Our Future
42 min
The Curious Case of Dean Winchester
42 min
Changing Channels
41 min
The Real Ghostbusters
40 min
Abandon All Hope...
42 min
Sam, Interrupted
41 min
Swap Meat
42 min
The Song Remains the Same
41 min
My Bloody Valentine
41 min
Dead Men Don't Wear Plaid
42 min
Dark Side of the Moon
41 min
99 Problems
41 min
Point of No Return
42 min
Hammer of the Gods
40 min
The Devil You Know
42 min
Two Minutes to Midnight
42 min
Swan Song
42 min