Delta Fifty was an Ood who caught the Red-eye on the Ood Sphere in 4126. He killed his master, Mr Bartle, with his translation sphere. He tried to make a run for it, but one of the Ood Operations guards shot him. The Tenth Doctor and Donna Noble found him lying in the snow outside the facility. Delta Fifty went rabid for a few seconds before dying. The Doctor told Donna that Delta Fifty was a "he", not an "it". (TV: Planet of the Ood)