A Sour Note - S2-E2
Factual error: Gino commits a murder using a six-shooter with a silencer attached, and his shot doesn't make any noise. But it should have. Though it's a long-standing Hollywood cliché, a revolver with a silencer wouldn't be silent at all. Unlike automatic weapons, revolvers are open-chambered, which allows sound to escape. They can't be muffled with a silencer. (00:34:00)
A Sour Note - S2-E2
Continuity mistake: During his scuffle with Gino, Mundy's hair is messed up, then neatly combs itself, then is messy again, and so on several times between takes. (00:45:45)
Get Me to the Revolution on Time - S2-E5
Continuity mistake: At the party, Mundy is handed a cocktail that's blue in color. Next shot, when he starts to drink it, the cocktail has changed colors - from blue to amber. (00:07:05)
Hans Across the Border (1) - S2-E7
Visible crew/equipment: The shiny black side of Noah's limo shows us a very nice reflection of several members of the camera crew. (00:32:15)
The Galloping Skin Game - S2-E10
Visible crew/equipment: While Mundy is tying up the unconscious Willie, the boom shadow is moving back and forth on the wall at the upper right of the screen. (00:27:05)
To Catch a Roaring Lion - S2-E12
Continuity mistake: The professor translates the two Chinese symbols from Mundy's brass rubbing. Then he's shown a Chinese business card, and states that the 12 symbols on the card say the same thing. But not one of the symbols on the card matches the first two from the paper. (00:24:25)
Guess Who's Coming to Rio? - S2-E13
Audio problem: When Katrina walks out of the building at the end and crosses the street to Dover's car, the sound of her boots on the pavement doesn't match the actual movement of her feet at all. (00:45:10)
Continuity mistake: Mundy shoots a palace guard with a tranquilizer dart, and the man falls unconscious on the stairs. When his fellow guards find him moments later, the unconscious man has somehow moved off the stairs and is now lying in the corridor. (00:39:15)
Plot hole: While Mundy is trying to disarm the briefcase bomb in the study, his time-sensitive work is interrupted no less than 6 times by people barging in from the party out front. The plot device adds comic relief, but there's no earthly reason why he couldn't have locked or barricaded the door in the first place. (00:36:00)
The Funeral is on Mundy - S2-E20
Continuity mistake: After Mundy fights with Susanna Sutton, Sutton's shoe slipped off her foot. While she sits defeated, Mundy looks for a nearby cord to tie her hands. Despite not moving from where she was, her shoe reappears on her foot. (00:37:33)
The Baranoff Timetable - S2-E21
Continuity mistake: Ortega takes Mundy's shoes (with lock picks hidden in the heels) and locks him up. Mundy soon has the confiscated shoes back on again, though, even before he escapes the cell. (00:40:00)
The Family - S2-E23
Continuity mistake: In the opening scene, Mundy is tapping into a line by climbing a phone pole. He's starting back down when the shot cuts to a wider angle - at which point he's back at the top and starts down the pole all over again. (00:00:55)