Moon in Scorpio

Suggestions:

Boys On Film 2: In Too Deep Tales of the Bizarre: 2002 Spring Special Tales of the Bizarre: 2003 Fall Special Tales of the Bizarre: 2008 Spring Special Tales of the Bizarre: 2004 Spring Special

A Vietnam vet with PTSD and his new wife are invited for their honeymoon aboard his war buddy's yacht along with a third war friend and their girlfriends. Soon, they are being slaughtered one-by-one by a mysterious gloved assailant with an unusual pronged murder weapon.