Case Closed Episode 537 SUB at Gogoanime

Synopsis: Jirokichi Suzuki receives a letter from the thief, Kaitou Kid which reveals that Kid plans on opening Jirokichi's impenetrable safe, the Iron Tanuki. The letter however is not written in Kid's usual style raising the idea that an imposter is after Jirokichi's safe. Sonoko invites Ran, Kogoro, and Conan to Jirokichi's house. After examining the security of the safe, Kaitou Kid's card, in its usual style, is found confirming Kaitou Kid's plan to open the safe. Conan suspects that Kaitou Kid is one of the three newly hired workers of Jirokichi. Jirokichi however continues to proclaim it to be the work of an imposter, causing Conan to suspect Jirokichi as Kid himself.