'Doctor Who' boss explains Ood return

Doctor Who showrunner Russell T Davies has explained his decision to give the Ood another appearance in the popular BBC show.

Before 'Planet of the Ood', which achieved an overnight rating of 6.9 million on Saturday, the servile creatures made their debut in the 2006 two-part story 'The Impossible Planet/The Satan Pit'.

Davies told Doctor Who Magazine: "The whole point of bringing the Ood back is to learn a lot more about them - if you look at 'The Satan Pit', they're a blank slate, really... but at the same time I thought benign, passive Ood for the whole 45 minutes would be a bit disappointing."

"When a monster's got a trick, then use that trick," Davies added. "Getting possessed and eyes turning red - that's what Ood do! So I was insistent that we had to see that happen again, but for a different reason."

> Click here for our review of 'Planet of the Ood'