“Gatecrash” (*1/2 out of four) was an uninvolving psychological suspense thriller about a loving couple (Olivia Bonamy and Ben Cura) who are involved in a hit-and-run accident involving a stranger (Anton Lesser) who it turns out is still alive and re-appears in their lives and puts them in a personal and psychological tailspin. Writer Terry Hughes adapted his own play into this film version but what may have worked onstage becomes tedious at feature-length. Plays almost like an arthouse version of “I Know What You Did Last Summer” but there’s no fishing hook nor Jennifer Love Hewitt here.