Inside India (1959)

While Professor Lightskull and Doc Twiddle are relaxing in their bachelor apartment a stranger knocks on their door, a Hindu by the name of Dingbat Din. He claims that a giant ruby has been stolen from the sacred idol in India and he has been sent to this country as an emissary to retain Lightskull's detecting talents to solve the case. Lightskull, Twiddle and Dingbat Din leave immediately for India.