In 2 episode flashbacks, dialogue is heard that was not in the original episodes. For example: in The Spanking flashback, when Mr. Drummond and Kimberly go into the boys' room looking for Arnold, Mr. Drummond asks if Arnold is standing under the bed (wasn't in the original scene).
In The Trial flashback, Mr. Drummond tells Kimberly he's not going to mention the cookie snatching, messing with her makeup, and folding legal papers into an airplane (not in the original scene).