The Best Episodes Written By Chris Lang

Having come to another dead end, Cassie and Sunny work on trying to prove a final theory into David Walker's death and catch the culprit.

Despite a tragic turn of events, Sunny and the team narrow down the suspects.

Following the discovery of seemingly incriminating items found at his house, Tim insists he bought them for his girls at a fete in Middenham. However, the team are not buying Tim's story. A new discovery leaves the team shocked and devastated, hitting Cassie particularly hard.

Crime drama series. Detectives Cassie and Sunny begin to find out a bit more about who David Walker was through speaking to his ex-wife Tessa.

Cassie begins to investigate the Brentford house and the theory that one or more of the suspects may have been abused at the gatherings that took place there. The enquiry reveals some information that allows Colin to come to terms with a shame that he has lived with for over 25 years. Sara is forced to confront her past in order to prove her innocence. Marion pushes her family even further away.

The team attempt to track a giant, underground insectoid predator from the future, and there is something about the creature that Matt isn't telling the team. Meanwhile, Philip shows Connor the true purpose behind New Dawn, and Abby becomes more suspicious of Matt and grows closer to discovering his secret, while Lester struggles at the ARC to make a good impression to Ms. Reece of the Cabinet Office for a knighthood.

As the investigation into Jimmy's death concludes, Father Robert finds that revealing the truth has lasting repercussions and Maureen lays her son Jimmy to rest.

When the body of a teenage girl who went missing at the turn of the millennium is found at a building site off the M1 motorway, four men are placed under the spotlight and their relationships are tested to the limit.

Cassie and Sunny identify four potential suspects who trained as police probationers together, and two of them are still serving officers. They have no luck finding the rest of the body and decide to go public about the discovery of Walsh's remains.

Cassie and Sunny interview each of the four suspects, who all deny knowing the victim. Bouting discovers Walsh was cautioned three weeks before his death.

Cassie and Sunny interview two of the suspects again and get closer to the truth of what happened to Walsh. Balcombe believes she may have found the cause of death.

As the investigation into Jimmy's death continues, Sir Phillip Cross makes a difficult decision while Father Robert comes clean to his family and the police.

Further examination of David Walker's history suggests that he was a troubled man with a number of issues. Marion has a prickly chat with Cassie about her past and the investigation reveals her close relationship with an IRA activist. As the police enquiries encroach on their lives, Sara and Colin open up to their partners.

James, Tim and Chris are exposed as having lied about their whereabouts on the night Hayley died. Pete reveals that he saw Eliot climbing into the holiday home through a window on New Year's Day, while leaves James struggling with the possibility that his son may have killed Hayley. Fran cracks a code in the dead girl's diary, suggesting that she met a local drug dealer on the night she disappeared.

The team investigate the brutal death of a golfer at a golf course, and discover an aerial Anomaly and a Pteranodon in the skies above. Claudia is convinced that the Pteranodon is responsible for the golfer's death and wants deadly force used against it, but Cutter and Stephen are convinced otherwise. Cutter's suspicions are confirmed correct when Claudia is trapped in the golf course's clubhouse by a deadly, flesh-eating swarm of Anurognathus. Meanwhile, Connor accidentally frees Rex from Abby's flat, forcing Abby and Connor to chase Rex across the golf course.

When a skeleton is unearthed, a car key found near the body is the only clue to the identity of the victim.

A disturbing allegation about David opens up a second line of enquiry for the team. How much Tessa actually knew about David's life threatens to ruin her relationship with her husband and son. Marion gets into trouble at work and jeopardises her marriage by refusing to open up about her past. After having his phone stolen and information exposed, Colin is blackmailed again - and Sarah's secrets push her family to breaking point.

Alice and Rob's relationship continues to disintegrate as evidence under questioning incriminates them further, and the children grow closer to David. Meanwhile, Tom's attempts to save his marriage are destroyed by his subsequent arrest, and forensic evidence throws new light on David's original conviction.

As the investigation in to Jimmy's death continues, Cassie and Sunny visit Father Robert Greaves hoping to identify the mysterious Jo-Jo.

When Emma finds out that ex-boyfriend Joe Ryan is facing eviction, the team find themselves travelling to Birmingham to take on Georgina Althorp, owner of an unscrupulous law firm. Mickey and the gang set about the ambitious task of selling Georgina a castle and a title - but will she bite? Meanwhile, it seems love is blossoming once more for Emma; are they about to lose one of the team for good?

When Ash finds out that the local football club where he grew up has gone bust and closed down, he suggests the Hustle gang should tackle the greed that has taken over the great game, as the drama continues. Of course, the team stand to make loads of cash in the process! When Ash has an accident and develops a rare condition that means he can't lie, it looks like it won't just be the con that's over but Ash's days as a grifter as well. Can Mickey, Albert, Sean and Emma convince the seemingly untouchable Coleman to score an own goal, or will they be shown a red card?

The investigation into Jimmy's death continues, as Cassie and Sunny question Sir Phillip Cross.

It becomes clear to the detectives that the four men have conspired to come up with a false account of what took place the night Hayley disappeared. Jake is assigned to track down Tim Finch's ex-wife to hear her version of events - and uncovers disturbing information about Chris Lowe's past. On a personal front, Sunny is offered the opportunity to rekindle his past marriage, and Cassie worries about her father's failing memory.

Cassie and Sunny discover Walsh was chased by all four suspects on the night in question. Willets realizes Fiona's blood sample may have been deliberately lost by Liz.

Matthew Taylor, a 16-year-old school boy was brutally murdered in the quiet Lake District. Five years later the accused is found not guilty and released from prison, but who did kill him?