The biggest gang war in six years threatens to explode on the hill. Death is in the air when the rival diablo and blood gangs -- The latter headed by recent mayoral appointee marcus peabody -- Stage pitched battles and count their casualties. Their struggle affects belker's undercover gig as a loan shark when peabody pops in asking for $25,000 to finance the conflict. Renko and some of his hill street friends meet the cowboy's future in-Laws after a fracas with some disgruntled youths has left the prospective groom with a few extra vents in his tuxedo. Other happenings: The recently separated furillo and davenport meet to discuss her growing disaffection for both career and the man she loves; The nervous calletano takes aim at winning the big duck blind on the game show "Lucky ducks"; And hunter is shaken when apollo, his noble steed, is striken with a serious illness.