Ah I see, so there is no background context. Then, several interpretations are possible. My first impression is 人 is plural, and the subjects of 食べなかった, 見た and 行った are all the same "people".
People who did not eat dinner went to the bank they had seen in a movie.
However, the subject of 見た can be the speaker/writer, i.e., 映画で見た銀行 can mean "the bank I had seen in a movie".
Anyway, I strongly recommend parsing the original Japanese sentence first, not interpreting the meaning from the given translation. The modifying clause is never put after the modified noun in Japanese sentences, so 映画で見た modifies 銀行, as joadbressan wrote above, and never modifies 人. Thus, your interpretations "the subject saw the person on the way to bank" or "the person in question was seen at the cinema or an actor in the movie" are impossible.