Favorite Son - S1-E6
Continuity mistake: When Lucifer meets with Chloe for the first time, Chloe has her arms by her side in one shot and on her hips in the next. (00:06:50)
Sweet Kicks - S1-E5
Continuity mistake: At the end, Lucifer throws Benny through the painting and you can see he's not in the painting itself, he's gone right through. When the shot changes however, Benny is back in the middle of the picture. (00:36:40)
Sweet Kicks - S1-E5
Character mistake: Benny tells Lucifer he's an ex-marine. I beleive it's the case that US Marines never refer to themselves as an ex-marine, with the quote often used as being "once a marine, always a marine" (00:09:20)
Suggested correction: First off, it was Hector who said he was an ex-Marine, not Benny. But just because someone goes against the cultural norm doesn't make it a mistake. There are a lot of Marines who refer to themselves as former or ex - Marines for various reasons.
Continuity mistake: When Lucifer tells Carver that "This woman [Chloe] won't have sex with me!" Chloe's reaction changes from the close to long shots. Note her mouth. (00:14:50)
Continuity mistake: At the end of the kitchen scene, Dan turns to tell Chloe he is disappointed in her. When he does this, in the shot from behind Chloe looking at Dan, Chloe has her hand on the door frame at head height and is leaning against her hand. When the shot changes to behind Dan looking at Chloe her hand and head have moved instantly with no time to do so. (00:04:00)
Continuity mistake: When Chloe is kicking Lucifer out of the kitchen at the start she has her hands on her hips in one shot and down by her sides in the next. When Lucifer finally admits defeat and says "Fine" (00:04:00)
The Would-Be Prince of Darkness - S1-E3
Continuity mistake: As Lucifer is leaving Linda's office, she has hold of her shoe up by her chest. When the shot changes it's now in her lap. (00:40:05)
The Would-Be Prince of Darkness - S1-E3
Continuity mistake: Lucifer looks at the file of Ty's ex and isn't holding the file in one shot but is in the subsequent shot. (00:21:00)
The Would-Be Prince of Darkness - S1-E3
Continuity mistake: Ty's agent places the folder down for Lucifer and Decker to look at. The position of the folders changes in subsequent shots. (00:20:50)
A Chance At a Happy Ending - S5-E16
Other mistake: After Amenadiel's necklace pin is removed, Chloe tells lucifer to get the blade, and he picks it up with the hilt still attached. But we saw in an earlier season that without that pin to hold it all together, the hilt just falls off.
A Chance At a Happy Ending - S5-E16
Continuity mistake: A guy with a face tattoo is in the opening scene, then the tattoo isn't there when the guard gets up.
Continuity mistake: The first half of the episode is based around the same time as early season 1, yet Reece is in the new precinct, which wasn't introduced until late season 2. (00:07:06)
Lucifer! Lucifer! Lucifer! - S5-E2
Character mistake: Chloe and Lucifer are sitting in Chloe's police cruiser staking out a suspect's car, and they get into a pursuit with the suspect in his Porsche. Chloe's police cruiser had no police lights or sirens blaring during the pursuit. Plus they are in a heavily populated metropolis; doesn't make any sense why they wouldn't have their lights on. It's standard police procedure to alert other drivers an emergency vehicle is on route, so they can yield/pull over and take care. (00:22:20 - 00:24:00)
Character mistake: Charlotte Richards says to Amenadiel that he and Pierce were "both former immortals who became mortal." Amenadiel never lost his immortality in any of the previous episodes, he just lost his powers. He can be killed by celestial objects like blades or other sharp objects. Pierce however did lose his mark because of Chloe's love, it is assumed, so he became mortal. (00:12:45)
Mr. and Mrs. Mazikeen Smith - S3-E3
Factual error: The therapist says to stop the bleeding, Maze will have to remove the bullet and stitch him up. Gunshot wounds are complicated. To remove the bullet one must first perform an X-ray to see where it is, and after the surgery is completed, especially for a gutshot, surgical drains need to be installed till the wound heals. It's a hollow space that will fill up with bile and nastiness and drains are needed to collect the fluid, or else it will just get infected. If only it were that simple. (00:26:30 - 00:27:00)
Devil Is as Devil Does - S4-E7
Character mistake: On Earl D. Bolden Jr.'s wanted poster, it says "if you see this man NO NOT approach..." It should say "DO NOT."
The Would-Be Prince of Darkness - S1-E3
Plot hole: Lucifer is not wearing a wire, since the 'fixer' could get suspicious. In the next scene, Dan, who is the person that Lucifer should introduce, is in constant contact with Chloe for no urgent reason. Why would the fixer not check him for a wire too?
Lucifer, Stay. Good Devil. - S1-E2
Other mistake: The dynamic of the scene with the paparazzi outside the party is quite absurd: forgetting the fact that the paparazzo just happened to have amazing parking privileges (the only sedan in the street, allowed somehow right by the red carpet!) the timing is all wrong, as he "just" made his escape a minute later, witnessed by Chloe walking away just then from the paparazzi brawl. She had walked past their lot already over 30 seconds before, while Lucifer stayed behind forcing the comical confession out of 'Friar Tuck'. (00:26:00 - 00:26:35)
Lucifer, Stay. Good Devil. - S1-E2
Factual error: The apple scene (as it often happens with Amenadiel's scenes) does not make much sense: ignoring the fact that the liquid in the glass suffers no slowdown (we can assume that being in Lucifer's hand somehow protects it), the apple is already on its descending arc when the two are talking by the piano, but is still up there well after a minute. By the speed it moves, it should already have fallen. Also, why would it drop vertically and not continue its trajectory? (00:13:50 - 00:15:50)