The Blacklist has given us a lot of good episodes, storylines, plots, turns - everything. Not all episodes can be great, and this one is an example of that.
While the premise of a "psychic-but-not-really-psychic" is an interesting one, I feel like it completely misses the target audience, and I do not believe it fits well with the other Blacklisters we have seen so far, nor any of the overarching storylines.
One of the things the series generally do well is walk the fine line between being realistic enough whilst still telling a fictional and interesting story. Not everything needs to be 100% factual, accurate, or even possible in real life (e.g. Exaggerated diseases, weapons and/or technology that does not exist but theoretically could), but I think this one went a bit too far beyond what I would consider plausible, even within its universe. The dioramas were cute, very creative even, but getting that much information from radio transmissions you can pick up on is too much of a stretch.
For the longest time, I thought the girl was actually the Blacklister, because the actual guy gets so little attention during the episode that you almost forget he exists. I guess his story matches the Blacklist much better than the subplot with the girl, but because it does not get any spotlight in the episode it kinda falls at the end when they get to it.
When I look at the season's story arc, I feel like this had little to no benefit to the overall story, so it just felt out of place on all fronts. It was entertaining nonetheless, so it gets a sufficient rating, but it was a bit disappointing compared to the great episodes I had gotten used to this season, even for a filler episode.