Voir Kolchak: The Night Stalker, Season 1 - Episode 17

Physically fit specimens (an Air Force pilot, a football player, a Green Beret) are all being targeted for a grisly death: their hearts are being cut from their chests with a dull blade while they're still alive. Kolchak (Darren McGavin) believes that ancient Aztec sacrificial rites are being re-enacted.