A frustratingly not-terrible action thriller.
Kevin Spacey believes he was born to play Bobby Darin. I believe he was born to play more interesting characters, and has, and will, but I can see his point. He looks a little like Darin and sounds a lot like him, and apparently when he was growing up he formed one of those emotional connections with a performer where admiration is mixed with pity.
Darin's own emotional connection was apparently with Frank Sinatra, a pop singer he hoped to displace. That wasn't going to happen; there is a point beyond which talent cannot be extended into genius. He died young, at 37, having lived most of his life on borrowed time. After rheumatic fever at 7, he wasn't expected to live past 15. That he found 22 more years, had great success and made recordings that are still popular today is an achievement, but not one that makes a biopic necessary, unless the filmmaker is moved by a personal obsession.
Kevin Spacey was, and "Beyond the Sea" is at least as much about Spacey playing Darin as about Darin himself. Is Spacey too old to be convincing as a singer in his teens, 20s and 30s? Yes, but not too old to play an actor in his 40s who feels driven to play such a role. Perhaps there are parallels. Spacey has struggled, been misunderstood, had triumphs and disasters, has recently been the target of malicious coverage in the British press (his sin was to presume to contribute to the London stage even though he is a Movie Star).
In his own best work, Spacey has achieved genius; he is better as an actor than Darin ever was as a singer, but there must have been a time when Spacey identified strongly with Darin's disappointments and defeats, and "Beyond the Sea" is about those feelings.