At the dinner table with Vanessa, after Trivette hangs up with Walker, he lays his phone down, puts a tip on the table, and leaves without his phone.
During the boat chase scene, you see people running down the walkway by the water but they then cut to long shot and no people. It happens several times during the chase.
Ernest Holcomb, the mayor's nephew, is referred to by name only once in this episode. This is when Walker accidentally calls him "Matt", which is the real first name of the actor who plays Ernest.