Walter is a British television crime drama film, written by Kevin Lygo under the pseudonym Ruby Solomon, that first broadcast on BBC One on 8 August 2014. Intended as a "backdoor pilot" for a potential series, Walter stars Adrian Dunbar as the title character, a detective inspector assigned to investigate the unsolved cases of a former colleague who met his death after falling in front of a tube train. Assisted by an eager new recruit, Anne Hopkins (Alexandra Roach) and his dim-yet-trusty sidekick Mike Minorsky (Kayvan Novak), Walter investigates whether his former colleague's death may have in fact been murder.