Is there an explanation for why Peter Capaldi has a role in an episode of Torchwood? I know that they explained why he was in the Rome Doctor Who episode but this
![In the thick of a new satire: Peter Capaldi on his new foray into gentle comedy | The Independent | The Independent In the thick of a new satire: Peter Capaldi on his new foray into gentle comedy | The Independent | The Independent](https://static.independent.co.uk/s3fs-public/thumbnails/image/2012/02/02/16/capaldi1024x768.jpg?width=1200&height=1200&fit=crop)
In the thick of a new satire: Peter Capaldi on his new foray into gentle comedy | The Independent | The Independent
![Doctor Who Torchwood crossovers - Freema Agyeman, Peter Capaldi and the Doctor Who actors playing other roles in Torchwood | Radio Times Doctor Who Torchwood crossovers - Freema Agyeman, Peter Capaldi and the Doctor Who actors playing other roles in Torchwood | Radio Times](https://images.immediate.co.uk/production/volatile/sites/3/2017/08/109800.jpg?quality=90&fit=620,413)