The third season of Battlestar Galactica ended with a cover of the Bob Dylan song All Along the Watchtower. I've listened to several versions today, and I like the Battlestar version considerably better than the others. I think that these are the best I've come across, in order of increasing how-much-I-like-them-ness.
Bob Dylan (original)
Eric Clapton and Lenny Kravitz (live)
Seph and the Bloods (never heard of 'em until now)
Bear McCreary and BT4 (Battlestar Galactica version)