Visible crew/equipment: When Ratchets gets up from the dining room table after Poirot turns him down, you can see the cameraman in the silver buffet on the table.
Visible crew/equipment: While Frannie and Annie are in the jewelry store, the movement of filming equipment is visible beside Frannie, at the bottom right corner of the screen. It happens again later, when Stanley is also at the jewelry store with them, and this time the film equipment is beside Annie and then Stanley. (00:27:40 - 00:59:15)