A truly enjoyable movie, that keeps you off balance (and seriously amused) from the very start, because it is difficult to anticipate moment-to-moment. The main scientist character is unusual and gets explored in ways one wouldn't get to explore if it were not for there being so many of him. Sometimes time-travel/multi-universe stuff can be irritating, but not so here, maybe because it is not a tool to achieve something but the thing that is attempted to be understood, and that keeps the mystery and plot going, all the while you can't decide whether you are rooting for the mad scientist(s) to succeed or to be stopped.
