When a Batman impersonator appears in Gotham City, the real Batman deduces that Karl Rossum is somehow involved and confronts the inventor. The other Batman, a duplicate, then shows up and a battle between the two takes place. After the duplicate Batman escapes, it begins its campaign to recreate H.A.R.D.A.C'.s goals of a robotic society.

Rob takes a day off to spend with friends, leaving Sandra to face the disciplinary board but it's suspended until he returns. Back on the river, the yacht hits a sand bank and the two women are in trouble. He ends up in Casualty and proves an awkward patient. A well known junkie tells Charlie she wants to quit and Duffy's recent tests are clear.