* Jane Merrow also appears in Episode #78 "The Angel's Eye"
* John Bluthal also appears in Episode #52 "The Damsel in Distress"
* William Sylvester also appears in Episode #73 "Interlude in Venice"
* Jerry Stovin also appears in Episodes #14 "Starring the Saint" and #60 "Sibao"
* William Dexter also appears in Episode #22 "The Rough Diamonds"
* Donald Sutherland also appears in Episode #85 "Escape Route"
* Donald Sutherland is a famous movie actor
*
Rosemary Donnelly - according to IMDB - appears here as Arlene McCleery (photo only) and 
later in Episode #118 "The World Beater"
*
John Bluthal's over-the-top performance is just perfect for the sleazy TV show host
*
You can see someone rise in the reflection of the terrace door - before Paul Zaglan rises in the next scene. (0:13)
*
The background is clearly a painting (0:15) [Submitted by Wojciech Trojanowski]
*
Although the set for the boat has a slightly different furniture than the one used in Episode
#67 "The Persistent Parasites" (0:38) 
it is the same - the pattern of the upholstery and the door curtain give it away (0:21).
*
Note how actor Donald Sutherland first spills booze over his pullover, which is clearly visible throughout the scene - until it suddenly disappears completely after a cut. (0:35)
*
McCleery's room set is the same as the one for Snyder in Episode #65 "The Crooked Ring" 
.
*
The actor in the chair is Leslie Crawford, uncredited here. Crawford also appears in Episode #97 "When Spring is Sprung" and #100 "Invitation
to Danger" (credited as Les Crawford). He also seems to be the "Leslie Crawford" mentioned in the end credits as Fight Arranger. [Submitted by Wojciech Trojanowski]
* Commentary with Jane Merrow on the Umbrella DVD.