Bacchus was married to his Chief Constable's daughter, Lisa, with a small daughter Leigh-Anne. He didn't love Lisa but married her as she was pregnant, and because his father-in-law told him his career would be over if he didn't. He was desperate to go to London and join the Met, but had snookered himself. He divorced Lisa – on her wishes – in series 4 and only occasionally sees his daughter.
Bacchus is an intelligent and brilliant cop, but he doesn't always play by the book. Lacking in patience he often wants to sprint through a case, leading him to cutting corners and sometimes breaking the law. Bacchus probably has a chip on both shoulders – he hates people cleverer and richer than him as well as hating people more stupid and poorer than him.