The Boggy Creek trilogy kicked off in 1973 with the first movie in the series The Legend of Boggy Creek. In 1977 a second film was released staring Dawn Wells, Dana Plato, David Sobiesk, Marcus Claudel, and in 1985 the series was completed with The Barbaric Beast of Boggy Creek, Part II
The The Milieu Trilogy trilogy kicked off in 1972 with the first movie in the series Milano calibro 9. In 1972 a second film was released staring Domiziano Arcangeli, Barbara Bouchet, Anne Canovas, Riccardo Cucciolla, and in 1973 the series was completed with Il boss
The The Cheetah Girls trilogy kicked off in 2003 with the first movie in the series The Cheetah Girls. In 2006 a second film was released staring Raven-Symoné, Adrienne Bailon, Sabrina Bryan, Kiely Williams, and in 2008 the series was completed with The Cheetah Girls: One World
The The Time Trilogy trilogy kicked off in 1966 with the first movie in the series San. In 1967 a second film was released staring Vojin Cetkovic, Dragan Jovanovic, Dubravka Mijatovic, Tanasije Uzunovic, and in 1968 the series was completed with Podne
The Rugrats (Theatrical films) trilogy kicked off in 1998 with the first movie in the series The Rugrats Movie. In 2000 a second film was released staring Elizabeth Daily, Tara Strong, Cheryl Chase, Christine Cavanaugh, and in 2003 the series was completed with Rugrats Go Wild
The Friendship Trilogy trilogy kicked off in 2001 with the first movie in the series Dil Chahta Hai. In 2008 a second film was released staring Arjun Rampal, Farhan Akhtar, Luke Kenny, Purab Kohli, and in 2010 the series was completed with Zindagi Na Milegi Dobara
The Sometimes They Come Back trilogy kicked off in 1991 with the first movie in the series Sometimes They Come Back. In 1996 a second film was released staring Michael Gross, Alexis Arquette, Hilary Swank, Bojesse Christopher, and in 1998 the series was completed with Sometimes They Come Back… for More
The Fight Back to School trilogy kicked off in 1991 with the first movie in the series Fight Back to School. In 1992 a second film was released staring Stephen Chow, Sharla Cheung, Man Tat Ng, Athena Chu, and in 1993 the series was completed with Fight Back to School III
The Jesse James (Republic serials) trilogy kicked off in 1947 with the first movie in the series Jesse James Rides Again. In 1948 a second film was released staring Clayton Moore, Steve Darrell, Noel Neill, George J. Lewis, and in 1949 the series was completed with The James Brothers of Missouri
The Love Hunter trilogy kicked off in 1972 with the first movie in the series Love Hunter. In 1972 a second film was released staring Milan Mumin, Jelena Stupljanin, Eleanor Hutchins, Brian Berrebbi, and in 1973 the series was completed with Love Hunter: Lust
The Secret Agent 077 trilogy kicked off in 1965 with the first movie in the series Agent 077 – Mission Bloody Mary. In 1965 a second film was released staring Ken Clark, Daniela Bianchi, Helga Liné, Jacques Bergerac, and in 1966 the series was completed with Special Mission Lady Chaplin
The The Roller Blade Seven trilogy kicked off in 1991 with the first movie in the series The Roller Blade Seven. In 1992 a second film was released staring Scott Shaw, Frank Stallone, Karen Black, Don Stroud, and in 1993 the series was completed with Return of the Roller Blade Seven
The The Ninja Trilogy trilogy kicked off in 1981 with the first movie in the series Enter the Ninja. In 1983 a second film was released staring Shô Kosugi, Keith Vitali, Virgil Frye, Arthur Roberts, and in 1984 the series was completed with Ninja III: The Domination
