Guest Stars Sarah Solemani as Lizzie Dawn French as Linda Emilia Fox as Scarlett Tom Basden as Noel Paul Cawley as Alan Jordan Long as Len David Calder as Mr. Reid Chandeep Uppal as Sabrina Christina Chong as May Wu Benedict Wong as Lau Andrew Koji as Jason John Warnaby as Ian Culverson Dougray Scott as Walker Nick Moran as Stevens Charles Walker-Wise as David Diarmaid Murtagh as Blake