This week, Martin becomes embroiled in a Salvadoran woman's quest to avenge the death of her family, and Teller tries to improve his relationship with his estranged daughter. Meanwhile, a link is established between a Saudi Arabian girl desperate to break free from the societal constraints imposed on her, and a Montreal doctor attempting to meet a stranger on a train. If you've not been following this Kiefer Sutherland vehicle, and you have a strong stomach, consider Supersize Vs Superskinny (8.00pm, Channel 4) as a viewing alternative.