Threshold (1981) is a Drama, Science Fiction film that follows celebrated heart surgeon Thomas Vrain supports the research of an offbeat scientist who has invented an artificial heart. Against the advice of the Ethics Committee, Dr. Vrain decides to perform the first artificial heart transplant. Threshold is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 5.3 out of 10 from 18 votes. Fans of drama movies may also want to explore similar titles below.