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 : Gene Hackman, Thriller, Patricia Luke, Ken Swofford, Denver Mattson, Majel Barrett, Neva Patterson, Charles Horvath, Edward Albert, Richard Widmark, Ted Gehring, George Fisher, Claire Brennen, James W Gavin, Jay Novello .