Gourmet Night (a.k.a. Gourmet's Paradise) - S1-E5
Revealing mistake: When the Colonel first meets Basil, the same shot is used twice of the Colonel twitching.
Sweet Smell of Succession - S3-E8
Revealing mistake: After the car chase, when the Jaguar crashes and the driver gets out you can see that the Jag's drivers seat is fitted with a motor racing harness instead of the normal road seat belt for the stunt.
Adam Driver/Chris Stapleton - S41-E10
Revealing mistake: Star Wars Undercover Boss: Starkiller Base: After Tim insults Kylo Ren as being fat, 'Matt' gets angry and Force chokes him before throwing him across the room into the vending machine. In the wide shot, you can see the rip line tied to Tim's back that pulls him into the vending machine. (00:03:50)
Revealing mistake: The waterfront set always features a blue, cloud-dotted sky, even when the streets are wet from supposed rain. And the clouds are static, never moving or changing, betraying the fact that they're part of a backdrop.