S.P.D. Emergency! This expansion has everything you need to join or oppose the galactic police force of the future! The leader of the Troobian Empire, Emperor Gruumm, is threatening to make Earth his next conquest, using the former A-Squad Rangers of Space Patrol Delta to carry out his nefarious plans. The B-Squad Rangers, led by Commander "Doggie" Cruger, are Earth's last line of defense.