The Judoon are galactic alien police resembling rhinoceroses that work for the Shadow Proclamation.
They appeared in the series 3 Sarah Jane Adventures story, Prisoner of the Judoon, in pursuit of a Veil life form known as Androvax that escaped from a crashed Judoon prison transport.
They have relatively low intelligence levels but possess sophisticated technology such as H2O Scoops that are capable of lifting large buildings and Thermal Guns that are able to disintegrate targets.

The Judoon first appeared as a major alien in the Doctor Who episode "Smith and Jones" as well as the episodes "The Pandorica Opens".
The Judoon are galactic alien police resembling rhinoceroses that work for the Shadow Proclamation. They appeared in the series 3 Sarah Jane Adventures story, Prisoner of the Judoon, in pursuit of a Veil life form known as Androvax that escaped from a crashed Judoon prison transport. They have relatively low intelligence levels but possess sophisticated technology such as H2O Scoops that are capable of lifting large buildings and Thermal Guns that are able to disintegrate targets.
The Judoon first appeared as a major alien in the Doctor Who episode "Smith and Jones" as well as the episodes "The Pandorica Opens".
List of Doctor Who universe creatures and aliens (H–P)