Although heaped with praise, Alan Silvestri's original Back to the Future score rarely escapes the bonds of its terrific main theme and occasional, but admittedly successful secondary motifs. Much of the action is percussive and a fraction uninteresting, Silvestri never quite manages to pull the whole thing together. To some extent, the same is true of the sequel, although it does show a slightly matured composer - one who'd manage to produce the terrific Who Framed Roger Rabbit? in between - and while much of the original material is revisited, the whole experience feels that bit more cohesive. In the pantheon of the sequel scores, this is firmly in the 'more of the same, but better' camp. It's not hard to be thrilled every time the immortal main theme appears and gives the heroic punctuation that the darker material needs, notably during Hoverboard Chase and Tunnel Chase. Admittedly, these two are actually well conceived generally, with ticking string motifs, the obligatory brass hits, percussion and even a Goldsmithian piano obbligato.
Some of the central passages are pretty low key and uneventful and Silvestri only just about manages to keep the ball rolling with an effectively sustained doom laden atmosphere. Despite Varese's Back to the Future Trilogy compilation album, I don't think many people will be happy until a full release of the original score is released, although so much of the material is reprised that this album makes for an adequate alternative. For my money, a more extensive selection of highlights from all three films would probably be a better alternative to the original albums anyway as none of them quite sustain their running time. If Back to the Future II lacks the freshness of the original or the thematic variety of the follow up, it still functions as a passable sci-fi, adventure score even if one can't help wondering whether some of it would register without such a terrific main theme.
Rating ~ Total Time ~ 44:47