Namak Halaal (transl. Loyal Servant) is a 30 April 1982 Indian comedy masala film, directed by Prakash Mehra and written by Kader Khan. The film stars Amitabh Bachchan, Shashi Kapoor, Smita Patil, Parveen Babi, Waheeda Rehman, Om Prakash, Ranjeet, Satyen Kappu in pivotal roles. It features music composed by Bappi Lahiri, with lyrics written by Anjaan.

The film went on to be the third highest-grossing Indian film of 1982, grossing ₹120 million (US$12.64 million).[1] It is the biggest comedy blockbuster of all time in India, where it sold more than 20 million tickets, with an inflation-adjusted net income equivalent to nearly ₹3 billion (US$40 million) as of 2019. It was remade in Telugu as Bhale Ramudu (1984) and in Tamil as Velaikaran (1987). The song "Raat Baaki" has been recreated by Tanishk Bagchi for the movie Ittefaq. The movie is most famous for the dialogue:

Format: NTSC, Color, Subtitled
Subtitles: English
Region: All Regions

Directed by Prakash Mehra
Written by Surendra Kaul (story)
Laxmikant Sharma (screenplay)
Kader Khan (dialogue)
Produced by Satyendra Pal
Cinematography N. Satyen
Edited by Jayant Adhikari
Music by Bappi Lahiri
Distributed by Chaudary Enterprises
Prakash Mehra Productions
Release date 30 April 1982
Running time 172 mins
Country India
Language Hindi

Cast

Amitabh Bachchan as Arjun Singh
Shashi Kapoor as Raja Singh
Smita Patil as Poonam
Parveen Babi as Nisha
Waheeda Rehman as Savitri
Om Prakash as Dashrath Singh "Daddu"
Ranjeet as Ranjeet Singh
Satyen Kappu as Girdhar Singh
Viju Khote as Talvar Singh
Ram Sethi as Bhairon
Kamal Kapoor as Raja Sahib
Suresh Oberoi as Bheem Singh
Ashalata Wabgaonkar as Nisha's GrandMother

Plot (Spoiler Alert!)

Bhim Singh (Suresh Oberoi) works as a manager and personal bodyguard to Seth Raja Singh (Kamal Kapoor) and saves him from many murder attempts planned by Raja's step brother, Girdhar Singh (Satyen Kappu). One day Raja Singh appoints Savitri (Waheeda Rehman), Bhim Singh's wife as trustee to their property and guardian to his toddler son Raja Kumar. On the same day, he and Bhim Singh die at the hands of Girdhar Singh. Savitri promises her husband that she would take care of Raja Kumar at any rate. Everyone including Bhim Singh's father Dashrath Singh (Om Prakash) blames Savitri thinking that she killed her husband and employer for money. Savitri hands over young Arjun to Dashrath Singh and settles herself as Raja Kumar's mother to protect him.

Later Arjun (Amitabh Bachchan) grows up to be a naive youngster under the care of Dashrath Singh. He moves to the city to build his life on his own and joins as a bellboy in a five star restaurant. There he meets Poonam (Smita Patil) and they both fall in love. That hotel is owned by Raja Kumar (Shashi Kapoor) and run by Savitri. Hotel manager Ranjit Singh (Ranjeet) is the son of Girdhar Singh and plans to kill Raja. They manage to show Savitri as a culprit and Raja believes that and suspects Savitri.

Gradually Arjun learns that Savitri is actually his, not Raja's mother and swears that he would protect Raja at any rate, just like his father did. Meanwhile, Raja meets a beautiful young dancer Nisha (Parveen Babi) and gets attracted to her. She is actually hired by Ranjit Singh to kill Raja, but Nisha falls in love with Raja and couldn't kill him. Finally she arranges a party on a boat to execute her plan, but Arjun foils it.

Finally goons kidnap Arjun's and Raja's family members and blackmail them to transfer all his property to Ranjit's name. Arjun and Raja beat all bad guys and save their loved ones. Raja marries Nisha and Arjun marries Poonam at the end and they reconcile with their mother Savitri.