Give Back the Panda! (パンダを返して! - Panda o Kaeshite!) is the 40th episode of Ultraman Ace.
Seiji encounters a man who has been stealing panda stuffed animals. He gives chase in the TAC Panther and notices that the thief is running at 60 km/h, much faster than a human could. He loses the thief in the warehouse district, but when he reports the incident to TAC, the others laugh at the idea of an alien stealing panda toys.
Ultraman Ace Volume 10 features episodes 37-40.