- Ambiguously Bi: He's only ever shown to be interested in women, but his team to make a point of telling him they'd be ok if he was interested in men, he is portrayed as having certain camp characteristics, and Kent has a pretty severe crush on him
- Broken Ace: He's from a good background, well educated, and well dress. He also has sometimes crippling OCD, and a constant need to prove himself.
- Bunny-Ears Lawyer: Despite his OCD obsession with cleanliness, he's good at what he does.
- Character Development
- Dark and Troubled Past: His father killed himself when he was a kid. Chandlers mother never really got over it, and turned to psychics and seances to deal with it.
- Deadpan Snarker: He certainly has his moments.
- Defective Detective
- Fire-Forged Friends: With Miles and, to a lesser extent, the team.
- Holy Backlight: Gets one in the final episode, in keeping with the allusions to a sort of holy war in the area. Possibly hinting that Chandler may be an Angel Unaware, though YMMV.
- I Just Want to Be Special: He just wants to solve interesting cases.
- Naïve Newcomer
- Neat Freak
- Oblivious to Love: Doesn't seem to realise that Kent has a pretty big crush on him.
- Is generally pretty oblivious when people are interest in him.
- Sharp-Dressed Man: He wears suits from Savile Row.
- Super OCD: Under normal situations, it's fairly mild. When he gets stressed, it goes Up to Eleven until he has to self-medicate with alchohol to remain functional.
- Thankfully its not treated as a 'quirk', and is a fairly good representation of OCD, considering. His obsession with cleanliness manifests itself into compulsively changing his shirt and being unable to leave the bathroom without scrubbing his hands raw at one point. When it gets bad, it is treated seriously. They don't just make fun of him for being a neat freak. Miles is particularly vigilant in making sure he doesn't 'go off the deep end'.
- Old-Fashioned Copper
- Deadpan Snarker
- Fire-Forged Friends: With Chandler
- The Matchmaker: On at least two separate occasions he tries to hook Joe up with a colleague.
- Papa Wolf / Big Brother Instinct: Shows signs of both towards Chandler.
- Parental Abandonment / Parental Issues: His father, who was in the pocket of the Kray brothers but was treated like a joke by them, left him and his mom. Actually, he was killed because he refused to let them touch Ray.
- "I will be like Atlas, carrying the weight of the investigation..."
- Amateur Sleuth: And the real detectives don't let him forget the "amateur" part.
- Man Child: Not an extreme case, but it fits.
- My God, What Have I Done?: Reacts like this in series 1 when he realises he's accidentally given advice to the Jack the Ripoff killer and again in series 3 when he feels like he could have done more to help the team.
- Magnificent Bastard: He and Double Agent Jack use Chandler and his team to depose the fake Krays, creating a power vacuum that he can then fill.
- Ambiguously Bi: His interest in Chandler is very subtle, but clearly romantic. He doesn't seem to have any other romantic interests in the series, female or male. His lack of steritypically camp behavior though save him from being Ambiguously Gay.
- Big Brother Mentor: Every member of the team tries to take this role for him to varying degrees. Hilariously, the one he seems to latch onto is Chandler, resulting in a very organized desk.
- Break the Cutie: Subverted. He's adorable and sensitive, and in the second season, he is harassed by most of the corrupt cops in the station, gets attacked and cut up with a knife, is harassed and threatened some more, is suspected of being The Mole by people he admires and trusts and is thrown off the team, and breaks down crying in the parking lot. This fails to break him, and when the team cracks the case, he's front of the line to cuff the culprits.
- As the series progresses however, it’s hinted that the pressures of the dark nature of the job have started to affect him. See Corrupt the Cutie.
- Can't Hold His Liquor: Is nearly always the first to get giggly/pass out during team outings.
- Corrupt the Cutie: Towards the end of the series, Kent shows signs of becoming quiet sinister. He certainly seems able to turn on the creep factor.
- The therapist in season 3 even alludes to this fact, saying that Kent may be more built to be the Bad Cop than he'd like to think
- Half Identical Twin
- Green-Eyed Monster: To all of Chandler's love interests in S3, and the platonic version towards Mansell in S4 over Mansell's relationship with his sister
- Ignored Enamored Underling: Kent could be the page image
- Odd Friendship: With Mansel in series 4, despite their differences.
- Red Herring Mole
- Puppydog Eyes: Of the brown eyed variety
- Sharp-Dressed Man: Although not as expensively dressed as Chandler, his off the rack suits certainly look the part.
- Straight Gay: Very possible, given his attraction to Chandler and his lack of interest in any of the female characters.
- Tender Tears: He deals with particularly bad cases by having a cry in the parking lot where he thinks nobody can see him. Men Don't Cry is averted because though the whole team knows, nobody thinks less of him for it.
- Driven to Suicide: McCormack hangs himself rather than having the police arrest him for betraying his fellow officers.
- An Offer You Can't Refuse: The Krays threaten his family to force him to betray the team.
- Face–Heel Turn: After being booted of the team in Series 1 for being The Mole, he returns in Series 2 as one of the uniformed officers who is working for the Kray’s against the team.
- The Lancer: Originally to Miles.
- The Mole: Rats the team out to the press in Series 1. Due to this, he was demoted as revealed in Series 2.
- Remember the New Guy: An old friend of the team and especially McCormack, only neither we nor Chandler recognize him.
- Odd Friendship: With DC Riley. Seemed to have failed when she finds out he's cheating. But series 4 shows them still going strong. Until Mansell fakes a romantic letter to Buchnan from Riley
- With Kent in series 4, despite their differences.
- Your Cheating Heart: After only six months of marriage he starts cheating on his wife. According to him: "I get bored."
- The Heart: She's the one usually seen offering comfort to the victims.
- Team Mom
- Mama Bear
- Odd Friendship: Has one with Mansell of all people. At least until she discovers he's cheating on his wife. But series 4 shows them still going strong. Until Mansell fakes a romantic letter to Buchnan from Riley
- One of the Boys: Explictly stated to be this in series 3 and by her actress.