Susanne Cramer, playing Gerta, and Kevin Hagen, playing Samuel Carleton, were in real life husband and wife when this episode was filmed. Submitted by PaulDrake 33, 25 August 2009. Unfortunately, Susanne Cramer (prolific in European films) died at only 32 years old, reportedly of pneumonia. cgraul 1.3.11

In her last appearance on the Perry Mason TV series, Jeanette Nolan plays Emma Ritter in this episode, “TCOT Fugitive Fraulein.” In her first appearance on Perry Mason, Nolan plays Mrs. Kirby in #22, “TCOT Fugitive Nurse.” Both episode titles have the word fugitive in them. Submitted by Charles Richmond, 31 January 2011.

The Volkswagen Beetle driven by Gerta in the opening act is the “big-window” version of the German classic (i.e. made after 1964). The “big window” refers to the rear window. Indeed most of the Beetles in this episode are this sort. Later, in what appears to be stock footage, we can see an older split-window style. Submitted by gracenote, 5/22/2011.
+ The 2 window beetle was 1952 and earlier so those are definitely a lot older. Submitted by HamBurger, 8/2/2020

The sign that the patrolman passes in the very first scene in East Berlin reads FISCHE FÜTTERN VERBOTEN or “FEEDING FISH PROHIBITED.” Submitted by gracenote, 5/22/2011.
+ The second sign -- Betreten Des Rasen Verboten stated that entering the lawn is forbidden. This supposed Berlin park is well supplied with Eucalyptus trees. Submitted by catyron, July 30th, 2018
++ And they're not even red gums !! Quipped by Notcom, 080919.

Character Names: Gerta’s last name is Palmer. Elke’s last name is Dietrich. Submitted by gracenote, 5/22/2011.

This is the only PM appearance for Eileen Baral (Elke), who was a cast member on the television series "Nanny and the Professor"...MikeM. 3/21/2017
+ The database also has Eileen Baral as born in August 1961 when her actual DOB is May 7, 1955 according to IMDB. Just looking at her you know she is older than 4 years old. Submitted by HamBurger, 06/17/2017, edited 8/2/2020.
++ "They do not need a six-year-old child." Spoken by Hans Ritter in his opening scene with Perry. OLEF641 9/16/21

This is the only PM appearance for "Violinist" Shony Alex Braun, a Hungarian Jew born in Romania in 1930. Braun was nominated for a Pulitzer prize in musical composition for his "Symphony of the Holocaust"...MikeM. 3/27/2018
+ Braun survived internment in both the Dachau and Auschwitz concentration camps. The pub he plays is in the Zigeuner Keller or Gypsy Cellar. At one point he performs a few lines of "Du Du Liegst Mir Im Hertzen" -- and if you want the full melody, you can find it here. This is the second time this song has appeared in the PM series. The earlier version was performed at a rousing beer-hall speed; Braun gives us the slower tempo version made popular by Marlene Dietrich. (Imagine Vanilla Fudge playing "The Pennsylvania Polka.") Submitted by catyron, July 30th, 2018

This is the final of six PM appearances for Gregory Morton (Wolfgang Stromm), who had a recurring role as Walter Williams for the final season (1965-1966) of the "Ben Casey" television series. Gregory Morton passed in Los Angeles in 1986 at the age of 74...MikeM. 7/31/2018

Who was the caller that Perry said Paul could "learn from my memoirs"? A Supreme Court Judge calling on behalf of the President? Joe B.04/20/2020

The $50,000 in prize money that Prof. Ritter offers in exchange for Elke would be more than $425,000 today (2021) OLEF641 9/16/21