Tomorrow I'll Wake Up and Scald Myself with Tea (1977)

Jan is a decent, boring man, living a decent, boring life as a rocket designer. When his adventurous twin brother dies in a breakfast accident, Jan decides to impersonate him, unwittingly becoming a part of a Nazi time travel conspiracy.

Director
Jindrich Polák

Stars
Petr Kostka, Jirí Sovák, Vladimír Mensík

Music by Karek Svoboda

Subs: English only.

YouTube link: https://youtu.be/ZCetGRXlZIE

A movie from Czechoslovakia that I posted in 2022 in one of my channels removed  by YouTube. This is a new link.

Copyright owner is blocking in these territories
Czechia, Slovakia