We covered a hell of a lot of ground, pigeons, etiquette, ghosts, lost stations, poetry on the underground, art, mosaics, large gaps, the Queen, cockneys, city commuters, overcrowding, air conditioning and drivers' announcements.
My section will end up being heavily edited as it's only an hour long show and the interviewer also spent an evening with a Leicester Square busker, a tube driver and will also be with a station controller.
It was all good fun and it was far less stressful than the last radio interview I did on an actual train itself (with BBC Radio London), probably cos it was a Sunday and probably because the interviewer was far less obtrusive and basically allowing me to do most of the talking.
Watch this space for a streaming of the show in November.
And before you ask.....no I can't speak German, my voice will be dubbed over, so you'll hear me in the background with a German voice over the top.