Horowitz in Dublin (1973) aka A Likely Story. Enjoyable made-for-TV American-cop-in-Ireland drama, and a great cast includes both Cyril and Sinead Cusack. A must-watch for Dubliners in particular, who will love the endlessly fascinating 70s Dublin location work. It's on Youtube.
Just found a great thread about this film from just a few weeks ago. This gentleman knows the locations better than I do and has thrown some clips in there too: https://twitter.com/TurloughADK/status/1290684997259735042