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Largest deficit overcome by an NHL team in a postseason series

Largest deficit overcome by an NHL team in a postseason series
Who
Los Angeles Kings, Philadelphia Flyers, New York Islanders, Toronto Maple Leafs
Where
Canada
When
2014
Four National Hockey League (NHL) teams have overcome a 3–0 series deficit, winning four straight games to triumph in the best-of-seven-game series: the Toronto Maple Leafs (Canada) over the Detroit Red Wings (USA) in 1942; the New York Islanders (USA) over the Pittsburgh Penguins (USA) in 1975; the Philadelphia Flyers (USA) over the Boston Bruins (USA) in 2010, and, most recently, the Los Angeles Kings (USA) over the San Jose Sharks (USA) in 2014.