Crei
From Tardis Wiki, the free Doctor Who reference
The Crei were a militant elephant-like species.
In the 24th century, they removed Prague from space-time and brought it aboard their spacecraft so they could search for the Tipping Device. The Third Doctor was captured and forced to help them look for it, but he tricked his captors and returned Prague to Earth. (PROSE: Midnight in the Café of the Black Madonna)
