THE enduring appeal of Feluda, the inimitable fictional sleuth created by Satyajit Ray, is the principal propel-lant in Baksho Rahasya (The Mystery of the Suitcase), a 90-minute tele film scripted and directed by the late master's son, Sandip. But what stands out in this taut, gripping, well-mounted whodunnit is the remarkable sureness of touch that the director demonstrates: there's no trace of artifice in the sustained economy of means. It flows naturally from his steadfast eschewal of the temptation to 'please'.