第 669 集: 偵探少年們邂逅七波群道與傳說中的黑塔
2012年9月15日 播出原創回
669
The Detective Boys meet Nanami Kyoudou, who's grandfather, Seitarou Kyoudou is the one who built "The Black Tower", rumored to have no entrance and treasure hidden within. Later, they visit her house (Source: TheTVDB)