Visible crew/equipment: "Service Station" (Adventure 6, Part 2): When Johnny Jack sits down at the cafe table, the shadow of a crew member's moving hand is visible on the shoulder and sleeve of his big gray coat.

Continuity: "Dr. McDee Must Die" (Adventure 5, Part 5):Three of the dinner guests leave the dining room together - through a door that we saw Steel lock just a few moments before.

Continuity: "Railway Station" (Adventure 2, Part 4): Steel's crooked bow tie straightens itself out between takes as he's confronting the soldier's ghost.

Deliberate "mistake": "The Creature's Revenge" (Adventure 3, Part 5): The 2-inch heels on Sapphire's bright blue boots disappear and reappear repeatedly. They're most often missing in the scenes she appears in with Steel, presumably so that her height won't exceed his.

Revealing: "Railway Station" (Adventure 2, Part 3): Steel orders Tulley to light all of the abandoned station's lamps with matches. But after the lamps are lit, they give off a steady illumination and don't flicker. It's obvious that they all have electric bulbs in them.

Continuity: "Service Station" (Adventure 6, Part 2): After the 1940s couple arrives at the diner, the tomato-shaped condiment dish keeps migrating to different spots on their table, even though no one is ever seen touching it.

Revealing: "Dr. McDee Must Die" (Adventure 5, Part 3): When the champagne glass shatters in front of Sapphire, you can see the mini explosive charge used to break it. It lands on the table among the glass shards.

Revealing: "The Creature's Revenge" (Adventure 3, Part 2): This apartment building has unbelievably clean elevator cables. Steel takes off his coat and then ties a knot in the cable - without getting a single grease smudge on his hands or his pristine white shirt.