* Redmond Phillips also appears in Episode #54 "The Set-Up"
* George Pravda also appears in Episode #9 "The Effete Angler" and #55 "The Rhine Maiden". He also had a role in "Thunderball"
* Jack Gwillim also appears in Episode #9 "The Effete Angler" and #82 "Paper Chase" (same role as here)
* Laurence Herder also appears in Episodes #69 "The Saint Bids Diamonds"
* Ray Austin also appears in Episode #13 "The Fellow Traveller", #22 "The Rough Diamonds", #52 "The Damsel in Distress" and uncredited in #95 "A Double in Diamonds". He would later direct Episodes #102 "The Desperate Diplomat" and #111 "The People Importers"
* Michael Wolf also appears in Episode #55 "The Rhine Maiden"
*
Although not credited Gerard Heinz
who also appeared in Episode #25 "The Sporting Chance", #69 "The Saint Bids Diamonds"
and #75 "The Reluctant Revolution" has a short cameo
in this scene.
* This episode makes strong use of the backlot - each corner serves as a different spot in Hamburg.
*
The name of the hotel is slightly misspelled -it should be "NEUE ZEITEN" instead of "NEUEZEITEN". (0:08)
*
This is a slightly redesigned fake
corridor painting as seen in Episode #72 "The Queen's
Ransom" and #75 "The Reluctant Revolution" (0:08)
*
The German translation is wrong
- neither "Kompliments" nor "Antiken" is correct. It should rather read
"Mit den besten Empfehlungen" and "Antiquitäten". (0:10)
*
The black Mercedes was used twice during this episode on the backlot set - look for the number plate. (0:13 and 0:16)
*
This view of Hamburg is just a painting - and it almost looks black & white.
(0:16)
*
Since this is a painting, the window in Templar's room doesn't show a night scene. (0:23)
*
Another appearance of the Mercedes.
(0:46)