Surendranath has directed about 3,500 television commercials in a span of about 35 years, including advertisements for Liril soap, Nirma Washing Detergent, Vimal Sarees Suiting, Sunsilk Shampoo, Fair & Lovely, Taj Tea, and Himani & Charagh Din.
In 2013, she made a comeback featuring in the multi-starrer Netru Indru alongside Prasanna and Vimal, while also signing on to feature in Ajith Kumar's next film directed by Siva.
Rahasya has been produced by Mrs. Monica Vimal Maluka of ‘UVI Film Productions Pvt. Ltd.’ who has earlier co-produced Zila Ghaziabad.
She was working in All India Radio in Kozhikode before entering playback singing.She entered Malayalam films industry through Thiramala in (1953),her first song 'Ammathan thankakudame' (by music director Vimal Kumar) was a lullaby.She sang in hundreds Malayalam films from 1951 to 1967 and immortalised many songs including 'Unarunaroo Unikkanna', 'Kadavathu Thoniyaduthappol', 'Poove nalla poove,' `Kuruvikalai uyaraam' and 'Kadavathu thoni aduthapol' with her mellifluous voice.
Two books from Pathak's popular Vimal series — 65 Lakh ki Dakaiti and Din Dahade Dakaiti — were translated into English under the titles The 65 Lakh Heist and Daylight Robbery by Sudarshan Purohit, a Bangalore-based software engineer.
For this purpose, he blackmails into submission an innocent-looking chauffeur called Vimal (whose actual name is Sardar Surender Singh Sohal), a criminal wanted for embezzlement in Allahabad (he didn't do it), murder of Lady Shanta Gokuldas in Bombay (he had to do it to prevent rape and death of a girl), the robbery of gate money at Anna Stadium Madras (he was blackmailed into it).
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Vimal is blackmailed into joining a conspiracy to break into the vault of Bharat Bank at Amritsar to loot 6.5 million rupees (65 lakh) inside it.