Leon Broznic, 30, Operations Centre - Intelligence, Civilian.

Leon’s inventiveness has always been his strength, but in Series Two his ability to think outside police procedure helps lift TR to another level.

Leon is 30 years old and lives in a two-bedroom flat with his best mate Carter, a chef. His mother, an unconventional hangover from the beat generation, an eccentric Englishwoman, had him when she was 38 and gave him his first name after Trotsky and his surname after his Serb father. She is now living in a retirement village, and he visits her once a month (Leon never knew his father). He's a free-range guy who hates the idea of rules or orthodoxy. He eats when he's hungry, and sleeps when he's tired. He doesn't have a driver's licence, preferring to take the tram. He has very few people skills - but he'll charmingly remember your birthday, or compliment you on the thing you least expect. You can't pick how his mind works.

In reality Leon's a misfit, he's awkward, rumpled, a mess. He has terrible taste in clothes, wears battered footwear, and the team is convinced he even cuts his own hair. Leon hated school - and school hated him. As the alpha nerd he was the school bully's main target. Never excelling, never failing, always being beaten up. Leon, with his massive intellect, left in Year 10 vowing never to return to a life of education.

After leaving school he spent two years in his bedroom, sitting at the computer he built himself, rarely leaving the house. He had a website when most people didn't know what the web was. But more than that, Leon began writing his own games and programs, his own codes to download and hack into other computers. And he became very, very good at it - so good he hacked into the Department of Education computer and gave himself a HSC score among the top ten in the state. Just because he could. He got busted, but was never formally charged, and as such doesn't retain a record - except in his own folder of pride. Leon is a realist - he sees things as they are. For instance, he knows the world is doomed. All this talk of cutting back on carbon emissions is a load of rot. He’s done the maths, and knows it’s too late. This doesn’t make him pessimistic; it just makes him a bit sad.

Leon bumps into girls every now and then, often they're friends of Carter's. He's had three girlfriends - two dropped him and he dropped one. He figures they're not bad odds. Girls are no big deal to him, they can be awful big time-wasters and most of them have no idea which movies are cool.

Leon is an integral, critical, part of TR, and they collectively and individually know this. In any situation requiring his help, Leon is almost always a critical beat ahead of the others on the ground. Tactics and strategy - this is how his mind works. He feels superior to the people he works with - where would they be, with their guns and their pepper spray and their sirens and their negotiating skills, if they didn't have Leon gathering intelligence to guide them and to smooth the way.