Richard Bremmer (the face and voice of Lord Voldemort) is credited as "He Who Must Not Be Named", Lord Voldemort's title.
The actors who played the Slytherin Quidditch team are listed as the wrong roles. The role of Captain Marcus Flint is played by Jamie Yeates but credited to Will Theakston. In turn, Theakston plays Seeker Terrence Higgs; this role is credited to Scot Fearn, who plays Chaser Adrian Pucey. Pucey is credited as David Holmes, who actually played a Slytherin Beater and was Daniel Radcliffe's stunt double. This is rectified in the credits of Harry Potter and the Chamber of Secrets (2002) (Year Two), with the exception of Higgs, who is replaced by Draco Malfoy as Seeker.
In all eight films (including one movie [Year Six]), the P in the Potter surname in the film title is in the form of a lightning bolt, which represents Harry's scar, and is accompanied by thunder and lightning.
Thanks to Duke of Northumberland, Alnwick Castle.
The opening title zooms out in black against the cloudy background and reveals itself in gold when the lightning flashes in the background, after a few seconds it flashes to white.