Jarome Iginla scored with 6:28 left in overtime, lifting the Boston Bruins to a 3-2 win over the Detroit Red Wings on Thursday night in Game 4 of their first-round series.
The Presidents' Trophy-winning and defending Eastern Conference champions can advance with a win against Detroit on Saturday afternoon at home.
Detroit took a 2-0 lead early in the second period after Pavel Datsyuk and Niklas Kronwall each had a goal and an assist.
Torey Krug scored midway through the second period to pull the Bruins within a goal. Milan Lucic tied it at 2 early in the third period.
Boston's Tuukka Rask stopped 35 shots. Detroit's Jonas Gustavsson made 37 saves in a surprise start Thursday night, filling in for Jimmy Howard, who was out with the flu.