 Eight hours following the death of Adam Carter , Ros Myers ( Hermione Norris ) and Sir Harry Pearce ( Peter Firth ) discuss how they are to get back at FSB head of operations in London Arkady Kachimov ( Stuart Wilson ) . Afterwards , Ros returns to her hotel room , and destroys it in a fit of rage . The next morning , Harry asks Richard Dolby ( Robert East ) to go after Kachimov , but is refused . However , Harry decides to disobey and go after Kachimov anyway , and promotes Ros to chief of Section D , a position previously held by Adam . Harry calls Lucas North ( Richard Armitage ) to meet with him for information on Kachimov . Before Lucas arrives , he calls Kachimov to warn him Harry is coming after him . Later , Lucas is appointed a handler from the FSB , and is shocked to find it is his ex @-@ wife , Elizabeta Starkova ( Paloma Baeza ) . 
