Unknown Caller Word Search Puzzle – Search Characters, Actors and Actresses. Word Search Puzzle Solver. A psychopath uses a family's high tech security system with a ticking time bomb to terrorize them for 90 minutes demanding an answer to his question; 'WHO AM I?' Find out the following actor, actress, character names, and other movie-related words hidden in this word search puzzle based on this movie.. This includes identifying and searching for words that are related to : Assaf Cohen, Victor McCay, David Chisum, Rose Opengart, Henri Lubatti, Anjolie Nieman, Carla DeFranco, Regina Harbour, Louise Griffiths, Zachary Opengart .