Dr. Jonathan Clemens was the chief medical officer appointed to the Fiorina 161 Correctional Unit where he had served a seven year sentence for negligent manslaughter.
Jonathan Clemens was a highly promising young Doctor, but whilst high on morphine after a long shift, he perscribed a lethal dosage of pain reliever, resulting in the death of 11 men. He was sentenced to seven years in prison for negligent manslaughter, he was sent to Fiorina 161 to serve his sentence and stayed with the custodial staff as the resident doctor.
Encounter with Ripley
Clemens nursed Ellen Ripley, who had crashed landed on Fiorina 161, back to health and started showing around the correctional facility. He even starts a personal relationship with her, much to the annoyance of Harold Andrews, the warden of the facility. Clemens performs the autopsy on Newt as Ripley requested. He asks what they are looking for in the body of a girl who had obviously drowned, and Ripley tells him that they are investigating a possible case of cholera. Clemens firmly responds by stating that there hasn't been a case of cholera reported for 200 years.
Suspicions & Death
He knows that Ripley is hiding something from him, and to show that he would not lie to her, he explains why he has a bar code on the back of his head. When Clemens was on a residency, he got drunk after a long shift. The same night, there was a boiler explosion, causing forty injuries. Clemens was called back and, by prescribing the wrong pain killer dosage, was responsible for the deaths of 11 men. He was sentenced to Fiorina 161 and served his time, but chose to stay behind with the other inmates after they refused to leave. When Clemens ends his story, Ripley again lies about what has been going on around the prison. As Clemens injects her with a serum, the Alien lowers itself down behind him and lashes out through the curtains. After a very brief struggle, the Alien releases its inner jaw into Clemens' skull. Ripley and the mentally unstable Golic, strapped down in a bed, are the only witnesses.
- Clemens stated that there hasn't been a case of cholera reported for 200 years, meaning since 1979. However, this fact is innacurate in real-life as cholera still exists today.