Dolphin Tristan, after training in a dolphin special intelligence school, was sent on an important mission to a disguised military base of the USSR to obtain information about a new strategic weapon of the Russians - a submarine transforming into an airplane... After receiving a message that it had been discovered in our territorial waters unidentified object moving straight towards a secret base, Soviet command
| Actor | Role |
|---|---|
 Tatyana Dogileva(voice) | (voice) |
 Vasiliy Livanov(voice) | (voice) |
 Evgeniy Steblov(voice) | (voice) |