According to actor Vinny, AKA Vinesauce, Jerma's facial prosthetics for his Puzzler costume cost around $10k making them, according to Ranboo, the second most expensive part of the show. The most expensive element was the box in the finale.
In the wardrobe room, the third time the contestants turn to look at the wall, Ranboo taps SOS with his left hand. After a bit, their right hand reaches over to stop the tapping.
In the wardrobe room, the bit where The Puzzler broke the door with his butt was actually real. Jerma genuinely broke the door unintentionally, which is why there is a long pause so they can fix it.
The Puzzler (Jerma) was supposed to first pick Niki based on the audience vote. However, his earpiece broke and he would stall for time with duck-duck-goose. Dalgleish (Charlie) would manage to assist with the line "I think you should pick the person in red, she seems really sweet-she said she was nice."
Ranboo was initially supposed to throw the slime towel onto the lasers without the use of a fishing line. However, it reportedly took them about 45 minutes to throw it in the way the crew wanted, to which the line and jump-cut were suggested.