They're Calling, Open the Door (Russian: Звонят, откройте дверь, romanized: Zvonyat, otkroyte dver) is a Soviet feature film of 1965 directed by Alexander Mitta, the debut of the twelve-year-old Elena Proklova in the cinema.

Determined to impress Petya, Tanya immerses herself in school community activities and is assigned the task of finding an “interesting person” — one of the first pioneers.

Kolpakov introduces her to a renowned musician, Korkin, who agrees to attend the school event dedicated to the first pioneers but forgets as his concert tour approaches.

With the gathering approaching, she seeks out Kolpakov for advice, and he shares a moving story about a young bugler, a pioneer hero who lived next door to him and inspired his career as a professional musician.

Kolpakov concludes by playing a stirring tune on his bugle, filling the hall with powerful, resonant sound and leaving an indelible impression on everyone present.