Underwater Berets

Directed by Rasa Strautmane, Aleksandr Mazaev, Vladimir Tarasov, Aleksandr Gorlenko and Elena Prorokova

With Vasily Livanov, Tatyana Dogileva, Boris Bystrov, Semyon Farada and Vsevolod Abdulov

After training at the dolphin reconnaissance school, the dolphin Tristan was sent on an important mission to a secret military base of the USSR to obtain information about the Russians' new strategic weapon - a submarine that transforms into an airplane. After receiving a message that an unidentified object was discovered in Soviet territorial waters, moving towards a secret base, the Soviet command ordered to urgently send an experienced special agent, the dolphin Isolde, to intercept it.