by Liam Neeson; David Espar; Susan K Lewis; Joel Olicker; Chris Schmidt; Kate Churchill; Richard Hutton; Gail Willumsen; Noel Buckner; Rob Whittlesey; John Heminway; Bill Jersey; Mark Page; Clear Blue Sky Productions.; Quest Productions.; WGBH (Television station : Boston, Mass.). Science Unit.; WGBH Video (Firm);