Bobby Orr scored the Cup-winning goal on Mother's Day against St. Louis' veteran Hall of Fame goalie Glenn Hall, with an assist from close friend and teammate "The Turk" Derek Sanderson, at forty seconds of overtime.

BOBBY ORR!… scores and the Boston Bruins have won the Stanley Cup!The most commonly seen video clip of Bobby Orr's famous overtime goal ("The Flight") in game four is the American version broadcast on CBS as called by Dan Kelly.

This archival clip can be considered a rarity, since surviving kinescopes or videotapes of the telecasts of hockey games from this era usually emanate from CBC's coverage.

According to Dick Irvin Jr.'s book My 26 Stanley Cups (Irvin was in the CBC booth with Danny Gallivan during the 1970 Stanley Cup Finals), he was always curious why even the CBC typically uses the CBS replay of the Bobby Orr goal (with Dan Kelly's commentary) instead of Gallivan's call.

The explanation that Irvin received was that the CBC's master tape of the game (along with others) was thrown away in order to clear shelf space at the network.

[3] The New England Sports Network has played the CBS video of the goal but has used the original WBZ-FM radio call with Fred Cusick and Johnny Peirson.