The car Eddie Rico drives is a 1957 Lincoln Premier convertible. 3,676 were made. In excellent condition in 2021, an example of this car could be worth $76,000 or more. New it cost $5,381 (MSRP) which equates to over $50,000 in 2021.
When Eddie stops in at his mother's store in New York, his grandmother is watching a sci-fi movie on TV. The film is Earth vs. the Flying Saucers (1956).
In Sept. 1957, Columbia Pictures distributed this film on a double bill with Pickup Alley (1957) starring Victor Mature.