Pancha Thanthram is a 1974 Indian Malayalam-language fantasy thriller film directed by J. Sasikumar and produced by E. K. Thyagarajan.

The cast includes Prem Nazir, Jayabharathi, Adoor Bhasi, Jose Prakash, Sankaradi, Sreelatha, T. R. Omana, T. S. Muthaiah, Bahadoor.

[1] The story pivots around the mysterious death of Raja Vamana Varma, the king of a small city-state in Kerala.

Rajendran centres his investigation on Hotel Ding Mona, owned by a Chinese woman Kochang Farooka.

It turns out that the palace manager Kurup and the queen's faithful servant Kochu Paru are the real culprits.

Their aim is to unearth treasures – gold, gems and diamonds – hidden in the palace by the king's faithful servant Dinesh Chandran.

Rajendran succeeds in solving the mystery and it turns out that he is none other than the prince who ran away from the palace years ago.