BBCBlue Planet's The Deep was like a full-on underwater horror movie
After last weekend's surprisingly emotional first episode, Blue Planet went for a different approach for the second instalment: outright freakiness.
The episode was entitled The Deep, and the first signs that things were going to be weird came with this Stranger Things mash-up released on Twitter earlier on Sunday.
It all started innocently enough, with narrator, Sir David Attenborough, telling us there's an abundance of sea life living in the deepest, and more remote oceans on Earth.
The first nightmarish creature we encountered was the barreleye, a fish with a transparent head full of jelly so that it can see through the top of its own head.
But then we met this horror: a two-meter-long, 50kg humboldt squid, like something out of Alien. Or maybe Sharknado.
It turns out this squid hunts lanternfish, and when there are no more fish around, the squids turn into cannibals and start eating each other.
Elsewhere, we were introduced to alien-like fish that communicate by shooting out lights...
...before meeting the Deepsea Anglerfish, a sharp-fanged monster which produces a glow at the end of its 'fishing lure' to lure prey towards its enormous mouth.
Then there was this fish predator, who has been living on the seafloor so long that its fins have evolved to form actual feet.
Some light relief came when we witnessed sixgill sharks gorging on a huge dead sperm whale that sunk down to the seabed.
Delightful.
It was a lot for viewers to take in on a Sunday night...
Our nerves had barely settled when we encountered an eel twisting itself in knots while suffering from toxic shock.
Sir David then finished the episode by suggesting that what we'd seen nature achieve underwater hints at the possibility of extraterrestrial life.
So to summarise Blue Planet 2's The Deep:
Or even:
Or, to put it in emoji form:
