Ask Rhod Gilbert
1x05 Episode 5
1x03 Name, Rank and Number
Another excellent, standalone, WW2-set story. Though this time, it ends with the series' first few scenes at the titular prison. It seems the cast is complete.
A History of Horror with Mark Gatiss
Part 3 The American Scream [final episode]
Mark Gatiss' series comes to a close by examining the re-emergence of American horror films in the '60s and '70s, and why he believes the genre has stalled rather after this point. It's another insightful, personalised account -- again, despite the criticism from some quarters about what he's chosen to leave out, we're talking here about a three-hour documentary covering decades and decades of a major genre; there's not room to cover it all, and the level of insight he offers is preferable to a dry overview of everything (which, even then, would surely miss some things).
Indeed, the sole shame with this series is that it's only three episodes long -- another two, or even three, covering the beginnings of screen horror and just where the genre has (or hasn't) gone in the last 30 years would be most welcome.
9x06 Episode 6
[Watch it (again) on iPlayer.]