Another Time Machine? Bulma Uncovers a Mystery! (One More Time Machine?! Bulma Unveils a Mystery) is the sixty-seventh episode of Dragon Ball Z Kai. The episode first aired in Japan on August 8, 2010. Its American air date was June 16, 2011.
Bulma receives a phone call about one of her company's products from Capsule Corporation. She is sent a photograph of what appears to be Trunks' Time Machine that he traveled in. Trunks investigates this with the others only to discover that it is the exact time machine that he came in but three years later in his world. He recognizes it because of the word 'Hope' that Bulma wrote on the time machine. Kami realizes that the evil he felt four years ago was not the Androids but it was the monster that traveled back in the time machine.