Episode #1.4 - S1-E4
Continuity mistake: When they are looking at the database for Choi Seok-pan's relatives, Kang-bae has a bag strap over his shoulder. There is an adjusting buckle that is positioned over his shoulder in one shot, but when Guibanjang says "She sure did many good deeds", the adjusting buckle is now on top of Kang-bae's shoulder. The buckle changes position again when Kang-bae asks if "good deeds affect your next life", and then again two shots after this. (00:37:55)