This movie has a couple of decent action scenes, but is only fair overall. The plot is not much, and what there is moves slowly - the story is really just a device to set up a couple of aerial chase/shoot-out scenes that are the main highlight of the film. The airplane scenes are not bad at all for a 30's B-movie, and give some life to an otherwise bland film.The cast is adequate, though they and the characters are mostly one-dimensional. Lloyd Hughes is believable, though quite stoic, in the role of a pilot in charge of the border patrol. Eddie Nugent is likable, but not much more, as Hughes' brother and fellow pilot. Grant Withers plays the usual not-too-bright villain, and there are a couple of attractive women competing for Nugent's attention.As a whole, "Sky Bound" is not bad, but will probably be of interest only to those who are already interested in low budget films from this era.