"Improvisation on Tchaikovsky's ‘Pathetique’ (Andante)" is a 1949 instrumental track by Django Reinhardt, inspired by Pyotr Tchaikovsky's Pathétique Symphony.
The song was not released until 1987 in the compilation Rome, 1949-1950, Volume 2 [1]
It is featured in the Fallout TV series episode "The Trap", playing during the Vault 4 ad featuring Cooper Howard.