Star Wars: The Clone Wars - Season 3 Episode 18 -

An elite team of Jedi attempts to free Master Even Piell, who is in possession of hyperdrive coordinates that could harm both Separatists and Jedi alike, from an impenetrable prison, encountering reprogrammed battle droids, carbonite chambers and a younger Captain Tarkin along the way (before he joined the Galactic Empire). It is revealed that Piell and captain Tarkin each have memorized half of the coordinates.