"Invasion of the Chessmen"
After finishing a world tour, Prez returns and organizes a chess match between Chessking, the U.S. champion and the Russian team. Chessking appears to go insane during the match, and afterwards, Washington is plagued with a series of chess-themed bombings. Prez and Eagle Free track him down, only to discover the true culprit behind the attacks is not who they thought.
In an epilogue, an urgent meeting over gun control is interrupted by a gunshot through the window, followed by an ambulance leaving the White House.