The Good Samaritan is a 2012 psychological thriller film directed by Dale Lawrence. It follows detective Pat McGroin who works endlessly to catch a prolific mass murderer whose next victims may be closer to home than initially thought. The film stars David Nicoll as detective John Waterman and Danny Frattasi as detective Pat McGroin. It was filmed in locations around England and received an 18 certificate from the British Board of Film Classification.