Once in the Summer (Russian: Odnazhdy letom) is a 1936 Soviet comedy film directed by Khanan Shmain and starring Igor Ilyinsky, Leonid Kmit and Ivan Koval-Samborsky.

[1] Two friends, Telescop (Igor Ilyinsky) and Zhora (Leonid Kmit), assemble a car in their workshop and embark on a journey with the dream of reaching Moscow.

Along the way, they meet a respectable man who introduces himself as Professor Sen-Verbud (Igor Ilyinsky) and his niece Fenya (Elena Savitskaya).

In a small town, Sen-Verbud performs a simple trick for the local club manager and persuades him to announce an evening lecture by the "famous Indian professor," known for debunking miracles and superstitions.

The professor's schemes come to an end when a criminal investigator recognizes him as a notorious con artist, known for posing as "the third son of Lieutenant Schmidt," "Karl Marx's nephew," and "a wealthy suitor from Argentina."