I enjoyed this one, though I feel it could have been better. The metaphor in the title and used in the episode is a perfect one for the situation.

I was convinced up until the reveal that the "alien" was a sort of scavenging species 0 of the Borg, with the robotic look and the ability to adapt to phaser fire. I'm not sure how I feel about the writers going in a different direction. It fits with the theme OK, but the ending scene where they're all reminiscing about this forgotten crew of humans past didn't go down well for me. It's a generational ship, none of the original "good guys" were still on it, and it is very tempting to do the maths that for the 7000 on that ship, many thousands more have probably died and would die on the planets they've killed.

The ultimate lesson, of needing to have empathy even for your enemies is a very important one. Seeing how that is used to help Kirk grow is nice, and from what I remember, it is something he embodies quite a lot in his captaining. However, I am very confused why everyone is so bothered by the fact that they were humans. Surely they didn't need to be humans for this lesson to be learnt. They're all part of a federation of different species, and Kirk's captain literally is not a human.

The phone setup is a hilarious, and really clever solution to a problem, but plot-wise it fails to achieve anything because when the Enterprise crew actually need to use the phones, the alien ship and the comms jamming has already been disabled. But they use the phones anyway. I question whether a closed airlock decompressing would have quite enough inertia to balance out a chemical thruster, and if it was, why did they need the chemical thrusters at all in the first place. I felt like what was going on on the Enterprise was much less interesting than what we saw in the Farragut. I wonder how the episode might have turned out if it was shot entirely from the Farragut's perspective, with no hints of what happened on the enterprise.

Random other thoughts:

• Getting to see more of Scotty is really nice, especially his acerbic dialogue.
• Doctor M'benga, head medical officer, warzone survivor, having little screentime other than running phone cables and joysticks around is funny.
• Ortegas getting a light scolding for being a wee bit suicidal is all we got for her ongoing sub-plot.
• La'an has shown a previous liking for Kirk, but we didn't really have a chance to explore what her new thing with Spock means for that.
• I hope the transporter buffer wasn't affected by all this now that it's holding a literal horror from beyond in it