Where the men in the command post count returning bombers is nearly identical to where the command section in Dawn Patrol counts returning fighters flying over.
The movie showing in the nearby town of Weston that Grandpa Walton uses as incentive for Ben and Jim Bob to finish a chair order quickly at the Walton's lumber mill so that the mill will stay quiet during Mary Ellen's quilting party.
The "trailer" for "Zero Hour" includes dialogue (quoted and parodied) from "The Dawn Patrol"; the rolling titles (starting with "Zero Hour") parody those in the trailer for "The Dawn Patrol"; and at least one of the aerial combat shots is lifted directly from "The Dawn Patrol"