Very simple, yet engaging, "The Clock" makes use of some rather interesting casting, some slight but sincere characters, and a story that still works all right despite no longer having its original immediacy. Judy Garland and Robert Walker work surprisingly well as the lead couple, and James Gleason probably makes the picture with his scenes. The title is appropriate, both for its reference to the role of the station clock in the plot and also as something of a simple metaphor of the broader situation faced by the characters.
Generally, the best reason for having Garland in the cast is for her singing, yet here she carries the role without using her best-known talent. By keeping the character simple but believable, it works all right. Whenever you see Walker, it's almost impossible not to think of "Strangers on a Train" (although, of course, that film came later), yet here he also succeeds with a very different, sensitive character.
In contrast, Gleason plays exactly the kind of character role that he does best and most naturally, and it's hard to see the movie working without him.
He comes along at just the right time to keep things from petering out, and his character seems to provide exactly what was needed to keep the story from getting off-track.
Much of the movie is not especially memorable, and the production is unspectacular, though solid. Yet it's hard not to come away with a positive feeling from watching this simple yet pleasant and thoughtful film.