Amitabh Bachchan’s 80th birthday will be celebrated with pomp on the stage of Kaun Banega Crorepati (KBC) Season 14, the reality show that he has been hosting for the last 22 years.

The makers of KBC 14 have planned a surprise for Bachchan — his wife Jaya Bachchan and son Abhishek Bachchan will join him in tonight’s episode. Promos of this special episode show Big B getting emotional trying to answer questions from his wife and son.

Abhishek shared a behind-the-scenes video from the sets of KBC, giving us a glimpse into the hard work that went behind making the episode truly special. He wrote, “It took a lot of secrecy, a lot of planning, a lot of hard-work and a lot of rehearsals to get it right. But then again, he deserves no less! It was very emotional to be able to surprise dad and celebrate his 80th Birthday at the place he loves the most, his workplace.”

In the video, we see Abhishek preparing his lines and overseeing the arrangements for the episode. Bachchan is pleasantly surprised when Abhishek drops in during the shoot, and gives him a warm hug. A collage of old photos of the Bachchans is also screened during the episode. The video ends with the birthday boy cutting a cake with Abhishek and Jaya beside him.

Sony TV also shared a promo of this episode on their Instagram page. In the video, Jaya and Abhishek are seen on the hotseat. Jaya reveals she has heard that if Bachchan is influenced by any contestant, he sends them flowers and writes them a letter. As Jaya looks at her husband suspiciously, Big B wears a sheepish smile. Abhishek jumps in to support his mother in a heartwarming moment.

The special episode of Kaun Banega Crorepati 14 will air on Sony TV at 9pm on October 11.