Episodes 4, 5, and 6 are filler and a complete waste of time. Skip to episode 7 to continue the story. Nothing even remotely interesting happens in these episodes, and they contribute nothing to the story. Nor do they convey any relevant information about the loop. You can skip them entirely and it'll make no difference to the last two episodes.
Episodes 4 and 6 are just drama episodes with little to no sci-fi elements. In 4, an old man dies of some disease (seemingly cancer). That's it. Episode 6 is a love-triangle episode with a sci-fi twist. Except the twist makes no real difference and it plays out like every love triangle story ever. Episode 5 is kind of sci-fi, but just uninteresting. It's got something involving the loop, but that /thing/ could be replaced with a number of real-world objects, and the entire story would stay the same. Simply put, it's a boring everyday drama with a couple loop-things inserted. Also completely irrelevant to the other episodes.
This series should have been 5 episodes, but apparently Netflix over-ordered.
