M4uMv Search : toby dammit

During a trip to Rome, a debauched Shakespearian actor is tormented by fans, the press, the Italian film industry and the Devil who appears as a little girl seeking to collect his head

There are experiments to determine whether an alien gene can be used against a invading alien force and to improve the human species, this is while aliens are using a human form to infiltrate and seduce to steal back their super DNA