Following the BBC’s confirmation last week that Series 10 will be the last, executive producer Jane Featherstone promised that the relationship between Ruth and Harry is brought “to a head” and that the pair’s “conclusion is sensational”.

Set to begin on BBC One next month, the spy drama’s final series will feature new cast members Lara Pulver (True Blood), Geoffrey Streatfeild (Ashes To Ashes), Alice Krige (Deadwood) and Jonathan Hyde (Titanic).

> Buy the Series 9 boxset on Amazon.

Watch the BBC’s recent ‘Original British Drama’ trailer, featuring footage from Series 10…