Come September and Bengali cinema lovers will be treated to an Amitabh Bachchan film after a long gap of almost two decades.

The Big B would play the patriarch of a Christian family that finds itself pitch forked in a spooky situation at their home.

But "Ora Kara? (Who are they?)" is not a film about ghosts, but a suspense thriller. It also stars Dimple Kapadia as Bachchan's wife and Moushumi Chatterjee as the family nanny.

In the strictest sense, "Ora Kara?" is not a Bengali film, but only the Bengali dubbed version of producer Ravi Shankar's Hindi film "Hum Kaun Hain."

But so was Bachchan's other super hit Bengali film "Anushandhan", which too was a dubbed version of Shakti Samanta's "Barsat Ki Ek Raat" released almost two decades ago.

Bachchan has mouthed his own Bengali lines, but Dimple Kapadia, for whom too this is her only second Bengali film, has Rupa Ganguly dubbing for her.

The Bengali version of the film is slated for release next month.

Bachchan plays an army soldier trying to get to the bottom of a chain of spooky events at home where also lives his wife, two children, a nanny, a cleaner and a gardener.

Bachchan is rattled by a chain of strange happenings at his home, and the film is about how he deals with the eerie events.

The film has a small appearance by Dharmendra and Suhasini Mulay.