


Linda and the others hide in the lab, while Matt and Carter take tranquilizer guns to hunt for Sebastian using thermal imaging goggles. He begins to murder team members one by one, with Janice being his first victim. The next day, Sebastian waits until the whole team is inside the lab before he disables the phones and the elevator codes except for his own. Having followed Linda and Matt to the house, Sebastian cuts off his phone connection then drowns him in his swimming pool. After they leave, Kramer attempts to alert the Army. Linda and Matt go to Kramer's house and confess their experiments. The team discovers that they have been watching a recording and that Sebastian has been leaving the lab without their knowledge. Becoming increasingly unstable, Sebastian later kills a dog being used as a lab animal in a fit of rage. He leaves the lab again and spies on Linda and Matt, becoming enraged when he sees them about to have sex. Ignoring their threat, Sebastian assembles a device that runs a video loop of his heat signature in his quarters. Linda warns Sebastian that if he leaves again, she and Matt will tell the committee about the experiment. After he drives to his apartment to retrieve some items, he notices a female neighbor undressing and rapes her inside her apartment. Unable to cope with the isolation, he defies instructions and leaves the building. Sebastian is quarantined in the laboratory due to his condition and the other researchers construct a latex mask for him to wear around the lab. The procedure to return him to visibility fails and he is almost killed. The team becomes concerned that Sebastian is taking it too far. He enjoys sneaking around the lab in order to scare and play pranks on his fellow co-workers, one of which involves molesting Sarah. The procedure is successful and Sebastian turns completely invisible. He convinces part of the team to go right into human testing without military authorization, keeping the rest in the dark. Instead of reporting his success to the military, Sebastian lies to an oversight committee which includes his mentor Howard Kramer, telling them he is close but needs more time. Sebastian becomes infatuated with Linda again but, unbeknownst to him, she has become involved with Matt. The team succeeds in reversing the procedure, returning an invisible gorilla to visibility. His team includes ex-girlfriend Linda McKay, Matt Kensington, Sarah, Janice, Carter, and Frank. Arrogant scientist Sebastian Caine has developed a serum for the military that can make a subject invisible.
