Doctor Who: The Waters of Mars Word Search Puzzle – Search Characters, Actors and Actresses. Word Search Puzzle Solver. In a Mars base the inhabitants are being infected by a mysterious water creature which takes over its victims. The Doctor is thrust into the middle of this catastrophe knowing a larger one is waiting around the corner. 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 : Brewster, Gemma Chan, Lily Bevan, Paul Kasey, Cosima Shaw, Alan Ruscoe, Peter O'Brien, Max Bollinger, Zofia Strahnz, Sharon Duncan, David Tennant, Rachel Fewell, Joplin Sibtain, Charles De'Ath, Lindsay Duncan .