According to the The Doctor Who News Page, Leon Vickers and Mark Bonnar will both appear in episodes five and six of Doctor Who later this year.

Vickers will reportedly play a "Clone Worker", and previously appeared in an episode of Garrow's Law and will also appear alongside former Torchwood star Burn Gorman in 2011 film Laid Off.

Bonnar recently starred in a time-travel drama Paradox has also had recurring roles in The Bill and Casualty, his part in the two episodes is currently unknown.

The pair will star in episodes "The Rebel Flesh" and "Gangers" which have been written by Life on Mars co-creator Matthew Graham.

Series 6 of Doctor Who will begin later this year, with a second part of the series concluding in Autumn.