Doctor Who: Paradise Towers

The Doctor and Mel decide to visit Paradise Towers, a residential complex that promises a peaceful life to its residents. However, the establishment is far from what its name suggests. A conflict persists among the Kangs, humanesque, multicolour beings who gather in opposing gangs based on which colour of the rainbow they bear. Furthermore, killer cleaning robots prowl the halls, and a secret in the complex's basement poses the greatest threat of all