Harpoon is a 2019 Canadian horror comedy film written and directed by Rob Grant. The film stars Munro Chambers, Emily Tyra, and Christopher Gray, and is about three best friends who become stranded on a yacht in the middle of the ocean. It premiered at the Rotterdam International Film Festival on January 24, 2019, and played at several film festivals, including the Calgary Underground Film Festival, where it won the audience award. It was theatrically released on October 4, 2019.

Plot

Jonah, an unlucky, down and out twenty-something, is best friends with wealthy but violently unstable Richard. One morning Richard ambushes and brutally beats the unsuspecting Jonah, because he suspects that Jonah has slept with his girlfriend, Sasha. Sasha arrives and pulls Richard away, explaining that suspicious texts Richard found on her phone were actually her and Jonah planning to buy him a speargun for his birthday. Richard feels guilty and, to apologize, takes the two for a day trip on his yacht. With the tension apparently broken, the three begin relaxing on the boat. However, as Richard and Sasha talk, he realizes that she actually has been sleeping with Jonah. Richard, irate, aims his new speargun at Jonah, but Sasha hits him from behind. In the ensuing wild scuffle, Jonah's hand is shot with the speargun, the ship's radio is broken, and Jonah knocks out Richard.