Other mistake: Bree is drinking wine with Karl, but before in other episodes and season and episodes and seasons after, she sternly says she does not drink because she was an alcoholic.
Desperate Housewives (2004)
1 mistake in Season 6 generally - chronological order
Carlos: You know who you are, Gaby? You're the kind of person who would have turned away Mary and Joseph from the inn.
Gabrielle: Well, they should have called ahead.
Trivia: Across Season 4: Two Lois Lanes appear together in this season: Teri Hatcher played Lois Lane in The Adventures of Lois and Clark and Dana Delaney voiced Lois Lane in Superman: The Animated Series and its follow-ups.
More questions & answers from Desperate Housewives
Answer: He was investigating the lead not the case.