Water Wings - S11.E63

Slater is on temporary secondment to the river police, and investigates when a member of the local chapter of Hell's Angels goes missing following a brawl on a party boat. McCann tries to convince the man's girlfriend to speak out against other members of the chapter who were harassing the missing man, but it is only when she is violently assaulted does she decide to turn the tables and speak out for her lover.