Check out the wiki info
https://en.wikipedia.org/wiki/It_Ain%27t_Half_Hot_Mum
Reception
The series is no longer repeated on television in the UK.[2]Some critics viewed the casting of the Anglo-Indian actor Michael Bates as the Indian bearer Rangi Ram as an example of blackface,[3][4] "All Michael Bates [...] wore was a light tan", protested Jimmy Perry in a 2013 interview with the journalist Neil Clark, an admirer of the series.[5] In Clark's opinion, the series "delightfully lampooned the attitudes of the British in India", but is "wrongly attacked by the PC brigade for being racist and homophobic".[6] Such a perception, however, is believed to be at least partly responsible for the programme not being repeated on British television in later years,[4] along with, according to Darren Lee of the British Film Institute's Screenonline website, a belief that it contains "national stereotyping and occasionally patronising humour".[7] According to Mark Duguid, writing for the same website, it suffers "from its narrow stereotypes of its handful of Indian supporting characters as alternately servile, foolish, lazy or devious".[8] Its flaws have not stopped it appearing in several "best of" lists.[7]
The show's creators had been aware of the issues around the casting of a seemingly white actor to play one of the Indian characters, but relented owing to the lack of suitable Indian actors at the time.[4] Jimmy Perry defended the casting as Bates (who was Anglo-Indian) "spoke fluent Urdu, and was a captain in the Gurkhas".[5]