The "Ghost Hunters" (Wed., 9 p.m. ET on Syfy) headed to Annapolis, Maryland this week to investigate a spectral presence at the U.S. Naval Institute. Their target was a young lieutenant whose death was declared a suicide, but many believe it was murder. As no one was ever convicted for his murder, he's believed to now be haunting the facility. One of his known tricks is closing doors, and that's exactly what the team almost caught on camera.