Rules of the Game - Part One: When the body of a prostitute is found at Heathrow, a Ukrainian billionaire is arrested on suspicion of murder but Walker is forced to release him. [S] S11 Ep1
Rules of the Game - Part Two: The concluding part of this case of the crime drama. Maryna Petrenko stands trial for Malikov's attempted murder but makes a convincing case in court. [S] S11 Ep2
Kill the King - Part One: Crime drama. When a top paediatrician is found dead, the team find reason to suspect the grieving father who blamed the doctor for his daughter's death. [S] S11 Ep3
Kill the King - Part Two: The concluding part of this case of the crime drama. Connor instructs her team to stay vigilant as details of Carlisle's private life start to emerge. [S] S11 Ep4
Conviction - Part One: A recently released prisoner insists that he is innocent of the murder he was convicted of, prompting the victim's father to reconsider his stance on the case. [S] S11 Ep5
Conviction - Part Two: Concluding part. As Mark Randle's sister Sarah begins to reveal the truth about her brother's death, Ken Randle stands trial for the murder of Nick Fisher. [S] S11 Ep6
The Box - Part One: While on leave in Glasgow to take care of his increasingly senile mother, DCS Walker becomes involved in the case of a missing woman and sister of an old friend. [S] S11 Ep7
The Box - Part Two: Following his arrest, Ronnie Reid refutes the evidence in Anna's diary and her own mother questions its authenticity as tensions rise between Walker and Mullins. [S] S11 Ep8
Tracks - Part One: Crime drama. When the body of a teenage girl is discovered in a chalk pit, vehicle tracks are found at the scene that leading Connor and Walker to a local hardman. [S] S11 Ep9
Tracks - Part Two: Darren is found not guilty after an emotionally-charged testimony where he makes a personal confession, but Connor still believes that something is amiss. [S] S11 Ep10
Siren: Crime drama. Connor and the team investigate an audacious murder where an ambulance is run off the road and its patient is shot in the head. [S] S12 Ep1
Mirror Image - Part Two: Concluding part. The Delany twins' alibi appears watertight, but both Walker and Connor are suspicious and believe that something has been overlooked. [S] S10 Ep11
Mirror Image - Part One: Two-part crime drama. When police commander Jack Delany and his heiress wife are discovered brutally murdered, their sons and DCS Walker are distraught. [S] S10 Ep10
Curriculum Vitae - Part Two: The concluding part of this case of the crime drama. Further investigations cause the team to find themselves wondering who the real victim is. [S] S10 Ep9
Curriculum Vitae - Part One: Two-part crime drama. An emotive case begins with a mother returning from work to find her baby girl dead in her cot and her nanny having disappeared. [S] S10 Ep8
Paradise Lost - Part Three: The concluding part of this case. It becomes obvious to the team that a serial killer is on the loose when more victims die in similar circumstances. [S] S10 Ep7
Paradise Lost - Part One: Three-part crime drama. When a schoolteacher is found dead, her boyfriend is arrested but appears to be unable to remember anything about what happened. [S] S10 Ep5
Closure - Part Two: The police are being criticised for their lack of results, but there is every indication that the serial killer is spiralling as possible witnesses are killed. [S] S10 Ep4
Closure - Part One: A serial killer is targeting schoolgirls, Roisin Connor's case has gone cold, and similar unsolved murders keep surfacing as Walker puts pressure on Connor. [S] S10 Ep3
The Sins of the Father - Part Two: The concluding part of this case of the crime drama. As Richard Walker's behaviour reaches crisis point, just who was in the house with Emily? [S] S10 Ep2
The Sins of the Father - Part One: Two-part crime drama. DCI Connor and DS Satchell discover that a happy couple are hiding some dark secrets when their daughter is murdered. [S] S10 Ep1
The Lovers - Part Two: Susan Harrington makes a date with a man who promises to take her to her missing husband, but will Connor and Walker arrive too late to prevent a tragedy? [S] S9 Ep2
The Lovers - Part One: When his son-in-law disappears on honeymoon, a rich businessman pressurises DCS Walker for help because his daughter believes they aren't taking her seriously. [S] S9 Ep1
Blue Eiderdown - Part Two: Conclusion of the two-part drama. Walker comes under pressure as he and Connor are drawn into their victim's world with frightening repercussions. [S] S8 Ep2
Blue Eiderdown - Part One: First of a two-part drama. A young prostitute plunges to her death from a block of luxury flats - had she discovered the identity of her mother's killer? [S]
Suspicion - Part One: First in a two-part crime drama. Detective Chief Inspector Roisin Connor is called to an apparent homicide after a woman's severed hand is found in the Thames. [S] S7 Ep1
Concluding part. North struggles to make sense of what is an increasingly complicated case, but Walker is more concerned with his imminent interview for commander and family ties. [S] S6 Ep2
Two-part crime drama. DI North investigates the case of a woman abducted in broad daylight, but a sudden murder confession leaves the squad with more questions than answers. [S] S6 Ep1
The concluding part of this case of the crime drama. Forensic evidence establishes that the crime was committed 17 years earlier when the house was run as a bed-and-breakfast. [S] S5 Ep2
Two-part crime drama. When a 15-year-old girl goes missing and her bloodstained clothes are found, Detective Superintendent Walker heads the investigation into her murder. [S] S3 Ep1
The conclusion of this case of Lynda La Plante's crime drama. As the trial gets under way, Morton's strange hold over those who would testify against him becomes evident. [S] S2 Ep2
Shooter - Part Two: Conclusion. With his wife and child missing, DS Satchell is desperate to resolve the situation as Walker and Connor find a pressure point in the Bilkin family. [S] S12 Ep4
Shooter - Part One: DS Satchell and his family find themselves the target of a notorious crime gang when he witnesses the slaying of an informer following a jewellery raid. [S] S12 Ep3
Ghost Train: When a girl falls to her death from a Ferris wheel, it is thought to be a tragic accident until DS Satchell's aunt comes forward with suspicions of foul play. [S] S12 Ep2
Siren: Crime drama. Connor and the team investigate an audacious murder where an ambulance is run off the road and its patient is shot in the head. [S] S12 Ep1
Tracks - Part Two: Darren is found not guilty after an emotionally-charged testimony where he makes a personal confession, but Connor still believes that something is amiss. [S] S11 Ep10
Tracks - Part One: Crime drama. When the body of a teenage girl is discovered in a chalk pit, vehicle tracks are found at the scene that leading Connor and Walker to a local hardman. [S] S11 Ep9
The Box - Part Two: Following his arrest, Ronnie Reid refutes the evidence in Anna's diary and her own mother questions its authenticity as tensions rise between Walker and Mullins. [S] S11 Ep8
The Box - Part One: While on leave in Glasgow to take care of his increasingly senile mother, DCS Walker becomes involved in the case of a missing woman and sister of an old friend. [S] S11 Ep7
Conviction - Part One: A recently released prisoner insists that he is innocent of the murder he was convicted of, prompting the victim's father to reconsider his stance on the case. [S] S11 Ep5
Kill the King - Part Two: The concluding part of this case of the crime drama. Connor instructs her team to stay vigilant as details of Carlisle's private life start to emerge. [S] S11 Ep4
Kill the King - Part One: Crime drama. When a top paediatrician is found dead, the team find reason to suspect the grieving father who blamed the doctor for his daughter's death. [S] S11 Ep3
Rules of the Game - Part Two: The concluding part of this case of the crime drama. Maryna Petrenko stands trial for Malikov's attempted murder but makes a convincing case in court. [S] S11 Ep2
Rules of the Game - Part One: When the body of a prostitute is found at Heathrow, a Ukrainian billionaire is arrested on suspicion of murder but Walker is forced to release him. [S] S11 Ep1
Mirror Image - Part Two: Concluding part. The Delany twins' alibi appears watertight, but both Walker and Connor are suspicious and believe that something has been overlooked. [S] S10 Ep11
Mirror Image - Part One: Two-part crime drama. When police commander Jack Delany and his heiress wife are discovered brutally murdered, their sons and DCS Walker are distraught. [S] S10 Ep10
Curriculum Vitae - Part One: Two-part crime drama. An emotive case begins with a mother returning from work to find her baby girl dead in her cot and her nanny having disappeared. [S] S10 Ep8
Paradise Lost - Part Three: The concluding part of this case. It becomes obvious to the team that a serial killer is on the loose when more victims die in similar circumstances. [S] S10 Ep7
Paradise Lost - Part One: Three-part crime drama. When a schoolteacher is found dead, her boyfriend is arrested but appears to be unable to remember anything about what happened. [S] S10 Ep5
Closure - Part Two: The police are being criticised for their lack of results, but there is every indication that the serial killer is spiralling as possible witnesses are killed. [S] S10 Ep4
Closure - Part One: A serial killer is targeting schoolgirls, Roisin Connor's case has gone cold, and similar unsolved murders keep surfacing as Walker puts pressure on Connor. [S] S10 Ep3
The Sins of the Father - Part Two: The concluding part of this case of the crime drama. As Richard Walker's behaviour reaches crisis point, just who was in the house with Emily? [S] S10 Ep2
The Sins of the Father - Part One: Two-part crime drama. DCI Connor and DS Satchell discover that a happy couple are hiding some dark secrets when their daughter is murdered. [S] S10 Ep1
The Lovers - Part Two: Susan Harrington makes a date with a man who promises to take her to her missing husband, but will Connor and Walker arrive too late to prevent a tragedy? [S] S9 Ep2
The Lovers - Part One: When his son-in-law disappears on honeymoon, a rich businessman pressurises DCS Walker for help because his daughter believes they aren't taking her seriously. [S] S9 Ep1
Blue Eiderdown - Part Two: Conclusion of the two-part drama. Walker comes under pressure as he and Connor are drawn into their victim's world with frightening repercussions. [S] S8 Ep2
Blue Eiderdown - Part One: First of a two-part drama. A young prostitute plunges to her death from a block of luxury flats - had she discovered the identity of her mother's killer? [S] S8 Ep1
Suspicion - Part Two: Conclusion of the two-part crime drama. DNA tests confirm that the blood in the Harwood house belongs to Diane, and police make another grisly discovery. [S] S7 Ep2
Suspicion - Part One: First in a two-part crime drama. Detective Chief Inspector Roisin Connor is called to an apparent homicide after a woman's severed hand is found in the Thames. [S] S7 Ep1