Tonight, actor Colin Firth promotes his new movie The Importance of Being Earnest.

Owen has to decide whether the time is right to move back in with Laura, while he struggles to support a prisoner who could be separated from her newly born baby. An old flame of Liam's returns, and he finds himself questioning whether he has a future at Holby General.

Mi5's best officer, Peter Salter, seems to be joining the enemy. President Bush is scheduled to visit and it seems as though Salter is trying to stop the peace, is this all part of his mission or is he in fact a triple-agent?