"What Lies Beneath" offers a retread of season two's "Fool Me Once" that lacks the fun factor of that episode. Part of the problem this season, aside from the split of the dynamic duo, Castle's bumbling attempt to win Beckett back is not as good as it could be.
Overall, for the first episode out from the new dynamic, it had some legs for growth. Every episode must be viewed in that lens. As promised by the producers, the investigation into LokSat is in the background and not the central focus of the episode.
“XX” opens up right where “XY” ended with Beckett looking out the window of a seized drug house with the bad guys rolling up. Her and Vikram share a moment of reflection before they try to get some sleep.
Castle got off to a very strong start with "XY." The dual perspective of the episode an enticing entrance that will set off a season long arc, something the series sorely needed.
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