The glass wall (1953)

Peter Kuban, a Hungarian refugee, is about to be deported after jumping ship in New York harbor. He needs to find an ex-G.I. named Tom whom he helped during the war, as Tom can prove Peter's right to legal entry into the United States. If he can't find Tom within 24 hours and prove his case, he will be branded a fugitive and will be permanently disqualified for U.S. citizenship.