In episode 6, Ascension, The team hatches a plan to catch the killer. Airdate: Monday, February 26, 2018 at 9.00 p.m. on TNT
In episode three, Siege, with the Greeks’ grip on the city tightening, Hector (Tom Weston-Jones) and Paris (Louis Hunter) embark on a dangerous journey to a nearby ally to ask for help. Airdate: Saturday 3 March 2018 from 9.10pm-10.10pm on BBC One.
In Episode 4, Colours, a photoshoot on an army base turns sinister when one of the models is found dead, and the investigation is complicated when Sam Thursday is revealed to be involved. Airdate: Sunday 25 February 2018 from 8.00pm-10.00pm on ITV.
In the penultimate episode of Collateral Sandrine (Jeany Sparks) is increasingly fraught. Peter Westbourne (Richard McCabe) tracks her down, but fails to calm her. Airdate: Monday 26 February 2018 from 9.00pm-10.00pm on BBC Two.