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.

Described as a "comedy drama", with comparisons to fellow BBC stablemate New Tricks, the film was met with a number of negative reviews, including the Herald Scotland, whose writer described it as "the worst thing I've seen on TV this year." The film pulled in less than 3.34 million viewers, and was ranked outside the Top 30 programmes for that week.