King Nine Will Not Return (1960)

The pilot of a downed B-25, Capt. James Embry, awakens in the desert, with no memory of how he got there. More worrisome, his crew's nowhere to be found. He begins to wonder if he's hallucinating, especially after he sees one of his men, sitting in the cockpit. When he awakens in hospital, he thinks it might've all been a dream, but wonders: did any of this really happen?