Gridlock (game show)

Gridlock was an Irish television game show, hosted by Derek Mooney, that premiered on RTÉ on September 14, 1998. "Gridlock" replaced the long-running series "Blackboard Jungle", which was hosted by Ray D'Arcy.
The show lasted only one season. There were three teams of two people, each team representing a secondary school. One player on each team would answer general knowledge questions, while the other would try to achieve "gridlock" on a puzzle diagram.