Hate to be an anorak, but you missed out the final episode 'The Final Curtain' from your list.
Not heard the unmasking yet, but it's probably along the lines of ...."You swine Temple, you won't get away with this" ... "Look out, Steve, he's got a gun! ..."
The days of real telephones, with real numbers, and nightclubs were only for Mayfair toffs, with cocktails and cloakrooms ... and riverside gaffs at Marlow and Maidenhead. Unsurpassed ...