"Supernatural" star Mark Sheppard is out of the hospital after suffering 6 heart attacks and miraculously avoiding death ... flashing a smile on his way home.
The 59-year-old actor was spotted heading out of the Los Angeles-area hospital Thursday, grinning from ear to ear and dishing out some hugs to the hospital staff.
Mark appears to still have some post-op drains connected, which are commonly used to drain excess blood and fluid after surgery ... a small and temporary price to pay for the terrifying ordeal he faced less than 1 week ago.
As we reported, Mark claimed to have suffered a series of "massive heart attacks" after collapsing in his kitchen Friday, with EMTs bringing him back to life 4 times.
Mark had a total blockage in his left anterior descending artery -- otherwise known as a LAD.
Mark credited his wife and the St. Joseph's team for his survival ... and if his massive grin is any indication, he's likely got a new look on life.