Big Hero 6: The Series Episode 21 - Obake Yashiki Episode Title:Obake Yashiki.Episode Description:On Halloween Night, the gang goes to a haunted house, where they are sprayed with a gas that unknowingly places digital imaging lenses onto their eyes. Later the Big Hero 6 set out to stop Noodle Burger Boy's latest crime, but Hiro gets distracted after seeing Tadashi alive and roaming the city at night. He eventually meets his "brother" in the haunted house where he is overjoyed to see him again at first, but soon realizes that this was just an illusion created by Obake, caused by the lenses which turns their fears into reality...