The Head Alien is so kind to remind Sal that, no, she is not necessarily destined to replicate the terribleness of her mother. It’s a good lesson! One that’s, y’know, made completely moot one word balloon later when Head Alien drops that, well, actually, she was framed anyway, so nevermind. Sorry! We almost had a moment, here! …I’m just writing Head Alien dialogue here, aren’t I, in a universe where he’s not treading softly with Sal so he doesn’t get deaded again.
Anyway, now we know who was in that second tube. It was Linda’s dead, soulless body! Which is why I don’t tag it, since Linda is in a new one now. That corpse is just medical waste!