Sci-fi drama Torchwood has seen a leap in ratings with its move from BBC Two to BBC One.
The first episode of the third series was watched by 5.9 million viewers - the average audience for series two ranged between 2.5 and 4.2 million.
The third series was cut from 13 episodes to five and is being shown on consecutive days throughout the week.
Torchwood star John Barrowman said cutting eight shows for the move felt like "we were being punished".
"Other shows move from BBC Three and Two to One and they don't get cut. So why are we? It felt like every time we moved we had to prove ourselves," the actor told the Radio Times.
Doctor Who spin-off
The BBC said it wanted to create "a powerful sense of event" with Torchwood: Children of Earth.
The third series follows the alien-chasing team as they battle for the future of the human race against the fiercest force they have encountered.
John Barrowman stars as Captain Jack Harkness - Eve Myles returns as Gwen Cooper and Gareth David-Lloyd reprises his role as Ianto Jones.
Torchwood, a spin-off from Doctor Who, began life on BBC Three in 2006 - its highest audience during the first series was just under one million viewers.