I already have an idea for "Jack in the Box" (the next one) and will probably look at the others tonight, although some may have to wait until I watch as there aren't many screencaps to choose from at present (more might be forthcoming as I watch the episodes!)
PS: I has a tumblr. It is the biggest, most distracting timesink IN THE UNIVERSE, but there are so many awesome fanstuffs on there it makes me desperately sad that it didn't exist in the early noughties when I had infinite amounts of studentesque free time. (It also makes Jonathan Creek almost look like it has a fandom that comprises people other than me!)
Anyway, add me if you're on there. I would say join, but you wouldn't forgive me. Over and out.