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Visible crew/equipment: After Echo is extracted from the docks, the reflection of a camera rig can be seen on the side of Langton's van. It's within the last few frames of the shot so you may have to pause it to see.
Trivia: The Dollhouse is run by the Rossum Corporation. The word Robot was first used in a 1920s science fiction stage play about mechanical servants called Rossums Universal Robots.