David Cross, Debra Messing and Dave Koechner on ‘The Dark Divide'

NBC LA entertainment reporter Heather Brooker talks to the stars of “The Dark Divide.” The film is based on the true story of butterfly expert Dr. Robert Pyle and his perilous six-week journey through Washington’s Gifford Pinchot National Forest after his wife dies from cancer. The film will be released in theaters Sept. 18.