"I have very good reason to believe that Dark Magic is in a resurgence and I need to keep you safe from it…. Safe from Scorpius."
-- Harry Potter (CC2.8)
Harry Potter, sitting by his son Albus’s bed in the hospital wing at Hogwarts, has a conversation with a portrait of Albus Dumbledore. Dumbledore’s portrait is unable to give him the advice he wants, saying “I am paint and memory, Harry” (CC2.8).
When his son awakes, Harry forbids him from being friends with Scorpius Malfoy, whose parentage he will be investigating. Albus is threatened with being tracked by the Marauder’s Map and an unnamed surveillance spell, and is very upset by having to lose his best – and only – friend (CC2.8).
After Albus Potter's return from time travel, during early September 2020
This event takes place during the Roseless timeline, as described in the essay "Albus Potter and the lesson in Quantum Mechanics" by Nick Moline.
The spell that Harry threatens Albus with:
"I will fix you with a spell - which will allow me eyes and ears into your every movement, your every conversation",
feels like Dark Magic. It also sounds like a typical threat a parent will make to their teenager in anger without really meaning to follow through, although in this case it looks as though if Harry is serious about it (CC2.8).
Harry also says that Albus is a Gryffindor rather than a Slytherin: "Don’t play games Albus, you know what house you are", although Albus doesn't immediately register the implications of this remark (CC2.8).
From the Web
The theatre production opened in the West End of London at the Palace Theatre on 30 July 2016, with Jamie Parker in the role of Harry Potter, Barry McCarthy as Albus Dumbledore and Sam Clemmett as Albus Potter: Harry Potter and the Cursed Child, Parts One and Two