Mad Doctor of Blood Island is a 1969 horror movie directed by Gerardo De Leon and Eddie Romero. The film stars John Ashley, Angelique Pettyjohn, Ronaldo Valdez, Alicia Lopez, and Ronald Remy. When medical researcher Dr. Foster (John Ashley), his girlfriend Sheila Willard (Angelique Pettyjohn), and island expatriate Carlos Lopez (Renaldo Valdez) arrive on the mysterious Blood Island, they soon find all is not well. Several grisly, unsolved killings have left the villagers in an uproar. Ashley's investigation takes him to the jungle laboratory of the evil Dr. Lorca (Ronald Remy). It seems that Lorca has conducted an unethical chlorophyll experiment on an island inhabitant, which turns him into a blood thirsty monster. After much digging, Dr. Foster finally unearths the secret behind Dr. Lorca's experiments and the true identity of deranged killer. Dr. Foster is now faced with the huge task of destroying the creature before it kills him as well as everyone else on the island.