He planted a sort of communication device he pulled from his finger onto Slightly and it sort of melted into his skin making it invisible. Not that i can even begin to understand how tech works in 150+ years but still an impressive piece of tech.
Now that Kirsh however has discovered this but not immediately reported it to his overlord i wonder if now there is another player in play complicating things.
It was an interesting episode, especially seeing some of the kids developing in different ways. Nibs, the redhead, obviously is suffering from severe trauma after her encounter with eye octopus monster, Slightly is being manipulated extremely by Morrow, Wendy is becoming the Alien Whisperer and that other kid is trying to learn ( nifty ability to just download knowledge).
What i find fascinating though is how their child mental stage is coping with events that fully formed and secure adults would have difficulties to navigate but they have given them superhero level bodies and they don't realize how powerful and scary they can be to adults as evidenced from the discussion between Nibs and that female scientist ( i am so bad with remembering names).
So we have a Chestburster in play now, what could go wrong?