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
Continuity mistake: Talking with her daughter at the end of the episode, Chloe stifles her laughter with her hand in front of her mouth. In the matching reaction shot her hand is still on her chest. It happens again twice. (00:40:30)
Lucifer, Stay. Good Devil. - S1-E2
Continuity mistake: When Chloe asks Jimmy about Lucifer at the end of the episode, her good arm is down her side when seen from behind, or folded in the frontal views. (00:42:25)
Lucifer, Stay. Good Devil. - S1-E2
Revealing mistake: When Jimmy grabs the cell's door, in the shot that happens before he starts banging his head on it, the supposedly secure door gives way effortlessly, showing big gaps. (00:42:30)
Lucifer, Stay. Good Devil. - S1-E2
Continuity mistake: The quantity of blood on the door changes between shots, incoherently, when Jimmy is hurting himself, smashing his head on it. (00:42:35)
Lucifer, Stay. Good Devil. - S1-E2
Other mistake: We are shown several times the first person perspective of a paparazzi camera, with the HUD. From a diegetic point of view though, it is used in a way that lacks coherence. For instance, in the red carpet scene the photo count goes down by one every time the shutter clicks, while in the car scene it does not go down at all. And it really could not have been Josh's camera in the red carpet scene, because it photographed Chloe once he already escaped and from behind.
Lucifer, Stay. Good Devil. - S1-E2
Other mistake: Despite the presence of multiple paparazzi on site while a civilian opens a police car, drags the main murder suspect out of it for some rough questioning and generally creates a suspicious scene, nothing about it leaks in the news (one guy even takes picture of the other side of the road!).
The Would-Be Prince of Darkness - S1-E3
Continuity mistake: Lucifer gets waken up after his very PG foursome by Ty. When he says "Can you just help me, please?" Lucifer does not have his right hand on the shoulder of the girl, in contrast with the earlier and following take. (00:06:15)
The Would-Be Prince of Darkness - S1-E3
Continuity mistake: Chloe takes the phone in Lucifer's hand as he is watching the registration. Depending on the angle Chloe has her right hand on the phone itself or off it, signaling Lucifer to stay put. (00:13:15)
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)
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
Plot hole: During the credits, Chloe said of the victim "coroner puts her time of death between 1 and 3am", and she does indeed ask Ty's obsessive fan / ex-gf where has she been during that timeframe. When she looks at the security tape, the timecode starts rolling at 22:18 and goes on "for 3 hours." That does not account for the time of the murder at all, she has no alibi for the second half of the suspected timeframe! Not to mention, she said she saw Ty kiss the victim. When could she possibly have seen that? It's unlikely that before 10pm Ty was already drunk and getting randy with the girl, with the house full of guests. (00:25:00)
The Would-Be Prince of Darkness - S1-E3
Continuity mistake: Joe rubs his protege Ty's shoulders saying "But we kept it out of the press." Ty has his hand raised, while in the shot before he had it on the desk. (00:35:15)
The Would-Be Prince of Darkness - S1-E3
Continuity mistake: Lucifer enters the conference room of the "rebranding" of Ty. You can see Ty turn around in his chair, but after the cut he is still leaning against the table, performing the turn again a second later. (00:35:30)
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: At the end of the episode, the therapist in the first part of the conversation (before she gets her heels) holds her right hand on her bosom in the close-ups, while it is lowered in the wider angle. (00:40:10)
Continuity mistake: During the kitchen scene in the beginning, the number of pictures on the fridge keep changing in various shots. (00:03:00)
Continuity mistake: At the start when Trixie comes running in to give Lucifer a hug, Lucifer has got a jar in his hand. As the shot changes to him actually being hugged, the jar simply vanishes from his hand. (00:03:05)
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)