Jonas is asked to turn on an old friend, and things get complicated when Charlotte Canning reappears; at home, Kim fields a call from a depressed army wife who won't give up her location, and Charles feels guilty when he turns to Annie for comfort. Written by
Did You Know?
Side Angle Side is a geometry theorem more commonly written as SAS, this is also the abbreviation for the British Special Forces; the Special Air Service. See more
The building claimed to be MI5 is actually the MI6 building. See more
Walk the Fire
Written by Robert Duncan
This is used as the theme in seasons 3 and 4. See more