Continuity mistake: While Bud is lying on his porch, reading the book, Dr. Murdock shows up. In the closeup, facing Bud, he reaches out to Murdock with his right arm, but it cuts to the next shot and it's Bud's left arm outstretched.
Continuity mistake: After Bud tells Porter that Dan is out dynamiting alone, when it cuts back to Dan deep underwater, both of his scuba fins repeatedly disappear and reappear in the following shots.
