This was probably the best episode of the whole series, the construction was excellent, showing us the two perspectives, Charlie's and his journey, but at the same time it also shows us the suffering of those who stay at home. The scene at the Halloween party between Nick and Tao moved me so much, Nick has always been presented to us as a sensitive but strong boy, seeing him with that Captain America costume (which suits him perfectly) finally letting out all his sadness in Tao's arms... a scene with an incredible symbolic meaning.
Olivia Colman is unfortunately a superstar and had other work commitments that did not coincide with the filming of the third season of Heartstopper, she was also very sad because she had to film some very important scenes like the one on the beach at the end of episode 2, Alice Oseman decided not to replace her with another actress but to insert the character of the aunt with the splendid Hayley Atwel who was very good.
The hope is that if Netflix gives the green light to the fourth and final season Olivia can return in the role of Nick's mother.