The Four come back to the Baxter Building to find that things have become very strange in their absence. HERBIE is now speaking Spanish, the food and drink all tastes like chicken, and their neighbors and friends are not acting like themselves. When they discover the truth, can the FF survive when everyone around them is an alien invader?
This episode contains examples of the following tropes:
- Acting Unnatural: The Skrulls are not great at posing at humans. The heroes see through it rather quickly.
- Bluff the Imposter: Reed does this to prove that the people in the building are not human. Susan later tries to do it to explain why Ben is attacking one of the disguised aliens, but the alien catches onto her.
- The End... Or Is It?: Reed notes that the Skrulls took pains to get all their DNA and wonders if they've seen the last of them.
- Gratuitous Spanish: at the end of the episode.
- Imposter Forgot One Detail: More than one actually: Courtney is acting chipper and friendly towards Susan when she's normally very bitter, Willie is carrying around a sack of gifts and acting like Santa Claus, Alicia is just carrying her white cane around instead of using it, and HERBIE is spouting a bunch of word salad, in Spanish.
- Mythology Gag: Both the Skrulls and Willie the mailman first appeared in the comics.
- Out-of-Character Alert: One of the foremost strange things is that Cory, the grouchy neighbor lady who never stops complaining about the Four, now acts like she's their best friend.
- Tastes Like Chicken: One of the things that the Skrulls got wrong is that all the food and drink tastes, well...
- They Look Like Us Now: Reed mentions when the Four have to confront their clones that any one of them could be an imposter, because they've been split up.
- Word-Salad Humor: fake!HERBIE spends the entire episode talking in Spanish, and anyone who has even a remedial understanding of the language can tell that what he's saying is absolute nonsense.
