Each year, three brothers Samuel, Jeffrey and Michael Douglas visits their Japanese grandfather, Mori Shintaro whom the boys affectionately refer to as Grandpa, for the summer. Mori is a highly skilled in the fields of Martial arts and Ninjutsu, and for years he has trained the boys in his techniques. After an organized crime ring proves to be too much for the FBI, it's time for the 3 brother NINJAS! To use their martial arts skills, they team up to battle the crime ring and outwit some very persistent kidnappers!
as Grandpa Mori Tanaka
as Samuel 'Rocky' Douglas Jr.
as Jeffrey 'Colt' Douglas
as Michael 'Tum Tum' Douglas
as Hugo Snyder
as Samuel Douglas Sr., FBI
as Jessica Douglas
as Emily
as Brown
as Rushmore
as Marcus
as Hammer
as Bully
as Bully
as Store Owner
as FBI Agent Kurl
as Arab FBI Agent
as Fester
as Babysitter
as FBI Agent (uncredited)
