The Domino Principle. Word Search Puzzle Solver. The Domino Principle word Search Puzzle Game. Find words related to movie actors, actresses, and genres. Word Search Puzzle Solver. Roy Tucker a Vietnam war veteran with excellent shooting skills is serving a long prison sentence when a mysterious visitor promises him that he will be released if he agrees to carry out a dangerous assignment. This includes identifying and searching for words that are related to : Joseph V Perry, Ken Swofford, Farnesio de Bernal, Gene Hackman, Bob Herron, Majel Barrett, James W Gavin, Richard Widmark, Denver Mattson, Claire Brennen, Edward Albert, Patrick Allen, Charles Horvath, Eli Wallach, George Fisher .