Second Foundation Audiobook (Book 3 of Foundation Trilogy), by Isaac Asimov read by Dan Lazar -
Channis reveals his suspicions about the Second Foundation being located on the planet Tazenda, and takes the ship there. They first land on Rossem, a barren planet controlled by Tazenda, and meet with its governor, who appears ordinary. Once they return to the ship, Pritcher confronts Channis and believes him to have been too successful with the search. The Mule, who had placed a hyper-relay on their ship in order to trace them through hyper-space, appears, and reveals that Channis is a Second Foundationer. Pritcher's emotional bonds to the Mule are broken in the ensuing exchange between Channis and the Mule, and he is made to fall into deep sleep. With only the two of them left, the Mule reveals that he has brought his ships to Tazenda and has already destroyed the planet, and yet senses that Channis's dismay is only pretense. He forces Channis to reveal that Rossem is actually the Second Foundation, and that Tazenda is only a figurehead.