There's Just No Accounting... - S2-E18
Continuity mistake: While the kidnappers try to grab the judge's son, Bill drives up and stops them. When one of the kidnappers flees the scene Bill takes off after him, and as Bill rams his car into the kidnapper's car, Bill's car is entirely different. Then it reverts back to the original car. (00:31:00)
There's Just No Accounting... - S2-E18
Revealing mistake: After Ralph tells Bill that the kidnappers are planning to take another child, when Bigsby walks out of the Sherwin house, in the next shot just as Ralph flies off we can see the stunt's springboard between the bush and the tree. (00:31:05)
There's Just No Accounting... - S2-E18
Visible crew/equipment: At the end, when Carlisle claims he and Bill had a business lunch in June to discuss a case, Pam explains that La Maison Faire is very expensive French cuisine in Beverly Hills, and in the next shot an actor's T-mark is visible on the floor. (00:47:15)