The titular "Mad Dog", actually goes under the very anonymous name "Nick Nolte", and is played by Romano Kristoff, whom you may or may not remember from such classics as "Warbus", "Double Edge", or "Tough Cops". He is a cop who doesn't take it easy when the mob executes his stripper-sister, and he goes after them to get revenge at all costs. Another Phillipino superstar, Jim Gaines, has a small cameo in "Mad Dog II" as a snitch who gets offed in the bathroom.

A Cameroonese police officer (Alphonse Beni) and a CIA agent (Richard Harrison) try to prevent the Pope from being assassinated by Italian terrorists during his African tour.

After a dangerous top-secret formula is stolen, a government agent traces the thieves back to a mysterious island and a secret-society of Ninjas.

The story in short: Some kind of evil people, have found out a way to extract bodily fluids from the base of the brain of unsuspecting victims. This fluid is then used for some reason or another. A couple of western heroes have to stop this in true 80's action style, big explosions and violence ensue.

After their mission is overrun by North Vietnamese forces, a missionary couple, their Australian guide, a South Vietnamese major, a brothel owner and her daughter all get in the mission's battered school bus and try to make their way to safety. Soon after leaving, however, their bus is commandeered by three US Marines trying to get back to their base at De Nang. To reach their destination, they must fight through most of the North Vietnamese army.

The American army sets up a special force to free two American officers who were captured by the Vietcong in Vietnam in 1976.

The plot concerns a small group of people who are forced to flee from their base (which happens to be a Mission) in an old school bus when the VC launch a vicious assault upon it. Along the way they are joined by a group of three battle hardened American Special Forces soldiers and together they desperately fight to make it to safety.

After suffering a concussion from a grenade blast in Vietnam, Sgt. Frank Johnson has been getting flashes of his childhood in which strangely he is a ninja. Because of this, he is given a codename: "Black Fire" by the US Army. He is sent to San Sebastian together with his buddy Sgt. Jim Anderson to work as U.S. military advisers. One night, Sgt. Johnson discovers Capt. Salcedo of the local corrupt army is trying to transport arms.

A boy sees his parents gunned by criminals due to unpaid debts. Twenty years later, the boy, Mark Quinn, has become a hard-hitting cop, the kind that hates criminal scum, bending the rules to catch those criminals and drive them to despair.

Imagine a tropical paradise where beneath the sun's warm glow inhabitants indulge in sexual pleasures of all kinds. Such a place really exists, and it's called Pleasure Island.