Lucifer shows up at the police station to meet with Lt. Monroe in episode 1x05 “Sweet Kicks”. Chloe and Dan talk about the Palmetto case in episode 1x07 “Wingman”. Malcolm talks to Dan in episode 1x09 “A Priest Walks Into a Bar”.
Appears in 2 additional episodes.
Source: YVRShoots — Twitter
Ella flirts with the local detective while Candy thanks Lucifer for his help in episode 3x06 “Vegas with Some Radish”.
Source: Pop Goes the World — Twitter