Lawsuits fly when a widow believes a gifted surgeon allowed her husband to die so his heart could be transplanted into the doctor's ailing mentor and friend. Operation Heartbeat was the pilot movie for the TV series Medical Center.
| Actor | Role |
|---|---|
 Richard BradfordDr. Joseph Gannon | Dr. Joseph Gannon |
 Edward G. RobinsonDr. Lee Forestman | Dr. Lee Forestman |
 James DalyDr. Paul Lochner | Dr. Paul Lochner |
 Kim StanleyJoanna Hanson | Joanna Hanson |
 Maurice EvansDr. Easler | Dr. Easler |
 Kevin McCarthyClifford Coswell | Clifford Coswell |
 J.D. CannonThomas Jarris | Thomas Jarris |
 William WindomRaymond Hanson | Raymond Hanson |
 Shelley Fabares'Mike' Carter | 'Mike' Carter |
 James ShigetaChief Resident | Chief Resident |
 William MarshallDr. Harold Tawn | Dr. Harold Tawn |
 Audrey TotterEve Wilcox | Eve Wilcox |
 Angela CartwrightAngela | Angela |
 Alfred RyderDr. George Corlane | Dr. George Corlane |
 Robert EmhardtJudge | Judge |
 Michael EvansDr. Dave Falconer | Dr. Dave Falconer |
 Jason WingreenTechnician | Technician |
 Tim O'KellyJohnson | Johnson |
 Herb ArmstrongAnaesthesiologist | Anaesthesiologist |
 Marianne GordonSylvia Barr | Sylvia Barr |
 Karen NorrisMarie | Marie |
 Don QuineTim Martin | Tim Martin |
| EEvelyn FrankEvelyn | Evelyn |
 Mel CarterIntern | Intern |
 Christopher WestBonnie | Bonnie |