When I first heard the Cylon Switch Song, "All Along the Watchtower", I wasn't necessarily sold on its ability to be significant. I admit I did question their choice and was sure there had to be a better more powerful alternative. I have come to appreciate the Switch Song in the last few episodes of Battlestar Galactica, particularly the performances the song inspires each week from the Final 5, Grace Park and Katee Sackhoff.
Bear McCreary, music composer for BSG, gives us some insight on BSG's use of music as well as a preview of the DVD release.
'One of the biggest challenges of Islanded was actually scoring two different versions of it. In addition to the version you just watched, I also scored an extended version for the DVD release. Not only are many of the dialog scenes expanded, but there are several scenes that were cut entirely from the show that required substantial original music. One of these scenes established that Tyrol is now in the brig for his role in Boomer's escape and kidnapping of Hera. I was disappointed that this story point was cut from the episode, since Chief's arc last week was so emotionally powerful.'
You can read Bear's entire blog here