The Monks of St. Thomas Affair - S3-E5
Visible crew/equipment: When Illya is captured and taken to Abbot Simon, a boom mic dips into the shot over the group's heads. (00:43:10)
The Concrete Overcoat Affair (2) - S3-E12
Visible crew/equipment: When Miss Diketon walks in on Strago trying to make time with Pia, the boom shadow is moving on the wall behind his head. (00:10:55)
The Concrete Overcoat Affair (2) - S3-E12
Visible crew/equipment: When the captured Illya is brought into Strago's conference room, the boom shadow is lurking on the curved wall over their heads. (00:12:00)
The Yo-Ho-Ho and a Bottle of Rum Affair - S3-E19
Visible crew/equipment: During the fight aboard the plane, Solo's stunt double's face is fully visible several times. (00:43:30)
Visible crew/equipment: When Solo gets out of the cab in front of Thrush HQ, the taxi's windows catch a perfect reflection of the camera and a studio light as the driver pulls away. (00:14:50)
Visible crew/equipment: When Illya, outside in front of the skyscraper office building, stands beside the cab talking on his communicator, the boom mike is visible over his head throughout the shot. (00:40:00)
Answer: He must have ridden in an Eaton's store elevator while he was in Canada at some point. For some reason, this elevator reminds him of it. The show's original concept had Solo being a Canadian, so this may be a minor nod to that fact.
raywest ★