The renegade angel Anna escapes from her prison in heaven. She travels back in time to kill Sam and Dean's parents so that Sam is never born, and cannot be the vessel for Lucifer. Castiel sends Sam and Dean back to stop Anna.
Supernatural - Zur Hölle mit dem Bösen The Song Remains the Same (2005– ) Online
Anna comes to Earth to kill Sam to avoid that Lucifer uses his vessel. However, Dean and Castiel protect Sam and Anna travels in time to kill John and Mary Winchester before they get married and conceive Sam. However Castiel sends Sam and Dean back in time to protect their parents. But Anna is very powerful and the Winchesters are helped by an unexpected angel.
| Episode cast overview: | |||
 | Jared Padalecki | - | Sam Winchester |
 | Jensen Ackles | - | Dean Winchester |
 | Misha Collins | - | Castiel |
 | Julie McNiven | - | Anna Milton |
 | Amy Gumenick | - | Young Mary Winchester |
 | Matt Cohen | - | Young John Winchester / Michael |
 | Matt Ward | - | Uriel |
 | Juliana Semenova | - | Angel Dancer |
 | Daniela Dib | - | Devil Dancer (as Daniella Dib) |
 | Allie Bertram | - | Firebird Girl |
 | Luke Welland | - | Firebird Guy |
The episode in which Jensen Ackles first appears in Dawson's Creek is also called 'The Song Remains the Same' (Season 6, episode 2).
The episode is named after a song by Led Zeppelin.
Dean says, "Awesome. Six degrees of heaven bacon." He is referring to the game based on the premise that any two people on Earth are separated by no more than 6 acquaintances from each other. In Six Degrees of Kevin Bacon, players compete to find the shortest number of links between the role of any actor and those of Kevin Bacon who is a very busy actor.
First appearance of Michael in a vessel.
Dean says, "So she's gone all Glenn Close?" He is referring to the actress's role as a psychotic spurned lover in the thriller Fatal Attraction (1987).
Season 4 Episode 3, 'In the Beginning' also has a DeLorean reference when Castiel brings Dean back in time to April 30th 1973
While in the convenience store, Sammy rips out a page of the phone book to find someone's address, the same way Marty McFly does in Back to the Future.
This episode contains a couple of references about The Terminator
This is the first time Sam uses a angel banishing sigil. While he may have remembered it from Season 5 episode 1 or Season 4 episode 10, it's very likely that Dean would have taught Sam how to create and use one.
Body count: 3