Leningrad region. Territory, buildings of the biological station in Koltushi. The station employees conduct experiments with dogs and monkeys using the conditioned reflex method. IP Pavlov in the group of the delegation arrived in Koltushi; is present during experiments with animals, talks with his students, plays in small towns, walks with granddaughters, speaks (synchronously) at the 15th International Physiological Congress (Leningrad, 1935). The funeral of I.P. Pavlov. Academician L. A. Orbeli reads a lecture to students about I. P. Pavlov.