Which documentaries you watch

Old British serries which I still watching: The fool and horses, Black Adder, Alo Alo - evergreens and old mysteries Frost, Inspector Morse, David Suchet and Poirot, Wallander...Sherlock Holmes...
Huh? Can't believe you're not mentioning "Fawlty Towers"

As for documentaries: Space/Science definitely (i especially like the one with Morgan Freeman as host)

Not really documentary, but still like to watch: Forged in Fire