From Episode #23, The Case of the One-eyed Witness
Perry and Della dining at Ferrolds Cafe. Across the room, a famous Toulouse-Lautrec poster.
The poster is seen just to the right of Della.
The entrance. A classy joint for sure.
Is that Jeanette Nolan as bus passenger #2? Doesn't look like it to me, but it's close. What do you think?
Bus passenger #2 (left) and Mrs. Kirby (Jeanette Nolan, right).
It looks like the newspaper used in #17, TCOT Sun Bather's Diary, was used again in #23, TCOT One-eyed Witness. Note the points of similarity in the vidcaps below.
As seen in #17, TCOT Sun Bather's Diary.
As seen in episode #23, TCOT One-eyed Witness.