Det. Stephen Tree (Clark Johnson) is forced to deal with his inner demons when a ruthless criminal threatens to expose a dangerous secret from Tree's past. At the same time, Tree is investigating a whistle-blower's gruesome death. Alisen Down. Denis: Michael Sarrazin. Lt. Helene Peacock: Micheline Lanctot. Barnaby: Peter Stebbings. Directed by Stephen Surjik.