Timothy Hutton as Dr. Stanley Shephard

Lindsay Crouse as Dr. Diane Brady

John Lone as Charlie

Josef Sommer as Whitman

David Strathairn as Dr. Singe

James Tolkan as Maynard

Danny Glover as Loomis

Richard Monette as Hogan

Amelia Hall as Mabel

Philip Akin as Dr. Vermeil

Stephen E. Miller as Temp Doc

David Petersen as Scatem Doc

Judith Berlin as E.K.G. Doc

Paul Batten as Technician

Lovie Eli as Nurse

Stephen Nemeth as Lab Tech

Réal Andrews as Lab Tech

Bob Reimer as Helicopter Pilot

Blair Anderson as Powell

Dave Ryder as Powell's Assistant

Herb 'Kneecap' Nikal as Indian Guide

Eilizabeth Aulajut as Inuit Storyteller

Dennis Letkeman as Air Traffic Controller

Paul Stanley as Canuck