The cast has remained the same but the series of “Harry Potter” films has had its ups-and-downs, as directors have come and gone. Fortunately, “Harry Potter and the Deathly Hallows, Part 1” is one of the better installments, in the hands of director David Yates. The film is the first of two films covering the final book in the movie adaptations of J.K. Rowling’s bestselling books.

Despite its two and a half hour length, the fact that “Harry Potter and the Deathly Hallows, Part 1” is the first of two is inescapable. Yet the movie is exciting and satisfying. The film’s tone overall is quite dark, although there are a few moments of comic relief. The story of being on the run allows a dazzling array of breathtaking landscapes and visually dynamic effects, making the visual side of the film especially enjoyable.

The film’s tone is also more grown-up, as the characters themselves have grown into young adults. Gone are the scenes of the old school, as now, Harry Potter (Daniel Radcliffe), Hermione Granger (Emma Watson) and Ron Weasley (Rupert Grint) send their families into hiding before escaping under cover themselves. They and their supporters are forced into hiding by the rising power of those linked to the shadowy Lord Voldemort (Ralph Fiennes). Arrayed against them is an army of darkness that includes that vision of evil in pink, Dolores Umbridge (the wonderful Imelda Stanton).

With Harry, Hermione and Ron on the run, the overwhelming feeling is foreboding, scenes are dark and music is eerie, as the heroes relentlessly seek the magical evil Horcruxes they must destroy to break the grip of evil.

Many of the delightful cast of supporting characters returns, including Robbie Coltrane as Hagrid, Michael Gambon as a remembered Professor Dumbledore, Alan Rickman as Professor Snape and Helena Bonham Carter as Bellatrix Lastrange, but in much reduced roles. Instead, the focus falls much more on the central three. Adapting a book into a movie requires changes but overall the film sticks to the intent of the book.

The plot of pursuit by organized evil, plus lots of talk about subjugating “inferior” Muggles and the horrors of “mixed blood” amps up the Nazi overtones already in the story. Harry’s task of collecting the Horcruxes with the help of loyal friends Hermione and Ron seems an echo of “Lord of the Rings,” especially when wearing a Horcrux around one’s neck appears to have a nasty effect on disposition.

However the plot device does allow the storyline to bring to the surface underlying tensions in this triangle that needed to be addressed, including any attraction between Harry and Hermione. Why she would pick Ron over the “chosen one” is touched on, although that actor Rupert Grint has grown into a bit of a hunk might make this less a mystery for women in the audience. But the characters did need to address it.

The film also has more character development. As always, girl-power Hermione is far more resourceful and prepared than her two male companions but she gets to show her softer side as well. The relationship between Harry and Ron is further explored and they find a more even footing.

While there is less emphasis on magical fireworks, there is still enough to satisfy. Mysteries are revealed but there is less emphasis on political maneuverings and betrayals.

All in all, “Harry Potter and the Deathly Hallows, Part 1” is a well-made, appealing-looking, satisfying film, and a fine first step to wrapping up the beloved series.