Let's keep calm here...
Mission Impossible: The BBC has Svardian* dubs of the First Doctor story The Smugglers, all four episodes (missing in real life save for a few clips from episodes 1, 3, and 4). The original English was restored with the off-air** recordings made by Graham Strong.
* Svardia was where the IMF allowed the terminally ill prime minister to see firsthand the fact that his designated successor intended to become a dictator.
** In real life, the BBC holds audio recordings Graham Strong, Richard Landen, David Holman, and several others made by holding tape recorders to the TV. As in real life, Strong’s recordings for all four episodes of The Smugglers were the superior.