Sesame Street had one of it's classic and great films called The Bridgekeeper and in the films a guy is forced to show shaped objects to the bridgekeeper as a toll payment for crossing the bridge. There were two The Bridgekeeper films made for Sesame Street one of circles and one of triangles and appear to be from the 70's. One interesting theory though it's not for sure mentioned is that the late Robert Stack is thought to provide the voice for the bridgekeeper though it's whether or not Robert Stack's voice
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