Out of Time - S2-E1
Other mistake: Sara tells Jefferson that the professor has a one hell of a right hook (referring to Martin knocking Einstein out). Jefferson replies, "seriously, Gray punched him out?" The subtitles mistakenly say "Ray."
Other mistake: Issac is on the phone with his boss and he is holding his phone upside down, noticeable because his otter box case is upside down. (00:14:41)
The King of the Delta Blues - S2-E6
Other mistake: We see a character get shot and falling forward with back arched, as if the shot came from behind. Moments later we see the shooter and the shot came from the front. (00:31:25)
Surf N Turf - S1-E2
Other mistake: When Riggs calls the arms dealer's phone (agent Hirsch), Hirsch doesn't answer the phone, silencing the call and putting the phone in his pocket, but Riggs leaps to action and says "it was Hirsch's voice on the phone!" Realizing that the arms dealer and Hirsch are the same person but no-one answered the phone. (00:32:00)
Episode #1.4 - S1-E4
Other mistake: A major plot point is the rivalry between the Wehrmacht and the SS, who refuse to work together. After the explosion at the cemetery, it is the Wehrmacht who are explicitly described as rounding up and interning suspected resistance fighters, with the SS not being party to it. However, when Archer visits the internment camp, most of the staff are wearing SS uniform.
Dia de Muertos + Sicarios + Family - S3-E5
Other mistake: A caption is misspelled towards the end - it says "cementario" when it should be "cementerio". (00:36:20)