Magic in the Water

"Radio psychologist Jack Black (Mark Harmon) takes his children Joshua and Ashley on a 'vacation' to a lake in British Columbia, where they discover that the famous local lake monster "Orky" may not be just a gimmick. Along with their best friend Hiro and a local psychiatrist Dr. Wanda Bell, the siblings work together to stop polluters who are dumping toxic waste into the lake and help bring about justice."