Actor Khan acted in over 300 At the insistence of
Rajesh Khanna,
Manmohan Desai paid him the high amount of one lakh twenty-one thousand () for writing dialogue for the film
Roti (1974), which was produced by Khanna himself. He was most popularly recognised for working with actors
Amitabh Bachchan,
Rajesh Khanna,
Jeetendra,
Feroz Khan,
Mithun Chakraborty,
Anil Kapoor,
Govinda and in films directed by
T. Rama Rao,
K. Raghavendra Rao,
K. Bapaiah,
Narayana Rao Dasari,
David Dhawan. He has worked side by side with other comedians like
Asrani,
Shakti Kapoor and
Johnny Lever. Khan made his debut with
Daag, starring
Rajesh Khanna in the main lead role, wherein Khan played the supporting role of an advocate. But he got more visibility with the roles in successful films with
Rajesh Khanna in the lead, like
Mahachor, Chailla Babu, Fiffty Fiffty, Maqsad, Naya Kadam and
Nasihat. The period from 1982 to 2005 is considered to be the peak period of his career as he established his versatility in acting. --> He appeared as a villain in films like
Parvarish, Dhan Dhaulat, Lootmaar, Qurbani, Bulundi, Meri Awaaz Suno, Sanam Teri Kasam, Naseeb and
Naukar Biwi Ka between 1976 and 1982. However, it was only in 1982, that he gained popularity as a villain with the success of films with the lead hero being either
Jeetendra or
Rajesh Khanna and produced by Southern Indian production houses with the director being either
Narayana Rao Dasari,
K. Bapayya,
K. Raghavendra Rao or
T. Rama Rao - like
Farz Aur Kanoon, Jeeo Aur Jeene Do, Samraat, Justice Chaudhury, Mawaali, Maqsad, Naya Kadam, Qaidi, Ramkali, Hoshiyar and
Swarg Se Sunder. --> He also started getting roles as a supporting actor after 1984, with films like
Masterji,
Dharm Adhikari,
Nasihat,
Dosti Dushmani,
Ghar Sansar,
Loha,
Insaniyat Ke Dushman,
Insaf Ki Pukar,
Khudgarz,
Sherni,
Khoon Bhari Maang,
Sone Pe Suhaaga and
Vardi. From 1988, he starred in films written with him in main lead, like
Karz Chukana Hai,
Jaisi Karni Waisi Bharnii,
Biwi Ho To Aisi,
Ghar Ho To Aisa,
Hum Hain Kamaal Ke and
Baap Numbri Beta Dus Numbri. His work as a comedian was notable in
Himmatwala,
Aankhen and
Coolie No. 1. He starred in his comedy television series titled
Hasna Mat (), which aired on
Star Plus in 2001. He made a comeback on
Indian television with a comedy series
Hi! Padosi... Kaun Hai Doshi? on
Sahara One. Khan later appeared in
Lucky: No Time for Love (2006) and
Family: Ties of Blood (2006). His last screen appearance was in
Masti Nahi Sasti (2017).
Screenwriter Rajesh Khanna is credited with giving Khan his break as a dialogue writer in his film
Roti and thereafter he wrote dialogues for films with
Rajesh Khanna in the lead like
Maha Chor,
Chhailla Babu,
Dharam Kanta,
Fiffty Fiffty,
Naya Kadam,
Masterji, and
Nasihat, all of which were hit films at the box office. Other successful films for which he has written or assisted in dialogues include films starring Jeetendra like
Himmatwala,
Jaani Dost,
Sarfarosh,
Justice Chaudhury,
Farz Aur Kanoon,
Jeeo Aur Jeene Do,
Tohfa,
Qaidi and
Haisiyat. As a screenwriter, Kader Khan has worked with
Manmohan Desai and
Prakash Mehra for their films starring Amitabh Bachchan. Besides Amitabh, he was the only one to work in the rival camps of Mehra and Desai. His films with Desai include
Dharam Veer,
Gangaa Jamunaa Saraswati,
Coolie,
Desh Premee,
Suhaag,
Parvarish and
Amar Akbar Anthony and films with Prakash Mehra include
Jwalamukhi,
Sharaabi,
Lawaaris and
Muqaddar Ka Sikandar. Some of Amitabh Bachchan's films with popular dialogues and scripts were written by Khan. Some notable examples of these movies are
Mr. Natwarlal,
Khoon Pasina,
Do Aur Do Paanch,
Satte Pe Satta,
Inquilab,
Giraftaar,
Hum and
Agneepath. For the film
Agneepath starring Bachchan, had received the
National Film Awards. Khan was in demand by South Indian film production houses such as Padmalaya. Major filmmakers of southern cinema such as
Narayana Rao Dasari,
K. Bapayya,
K. Raghavendra Rao,
T. Rama Rao, Dasari Narayan Rao, D. Rama Naidu consulted Khan for doing the script and dialogue of the Hindi remakes of their southern language films. Some of these films included
Himmatwala (1983),
Justice Chaudhury (1983),
Haisiyat (1984) and
Singhasan (1986). As reported in
The Hindu, "He didn't just translate the original films into Hindi but transposed them into a new North setting, culture, context and language." He was the preferred dialogue writer for the Hindi films directed by K. Raghavendra Rao, Narayana Dasari Rao, K. Bapaiah and for films produced by D. Rama Naidu and K. C. Bokadia. He also wrote dialogues in other successful films in the late '80s to the late '90s like
Meri Aawaz Suno,
Angaar,
Jail Yatra,
Satte Pe Satta,
Katilon Ke Kaatil,
Waqt Ki Awaz,
Coolie No. 1,
Main Khiladi Tu Anari,
Kanoon Apna Apna,
Karma,
Sultanat,
Baap Numbri Beta Dus Numbri,
Humshakal,
Saajan Chale Sasural,
Hero Hindustani,
Aunty No. 1, and
Rajaji. He also wrote dialogues for films of Rakesh Roshan like
Khoon Bhari Maang,
Kala Bazaar and
Khudgarz. ==Personal life==