Bride of Frankenstein (1935)
The creature asks for a mate, and Elsa Lanchester plays both the Bride and Mary Shelley.
In the novel Victor builds a mate for the creature and destroys her before she wakes. Let her wake.
You want the sequel where the creature learns words, asks for a companion, and gets an answer.
What it keeps and what it changes
Keeps: the creature’s demand for a companion, and the blind man who teaches him words.
Changes: the outcome. Dr Pretorius pushes Henry to finish the Bride, and a prologue puts Mary Shelley, Percy Shelley and Byron on screen.
Whose story is it?
the creature’s, and briefly the Bride’s.
How much time does it ask?
1 hr 15 min, James Whale directing; Boris Karloff and Elsa Lanchester.
Universal, released 22 April 1935. Lanchester is credited as Mary Shelley; the Bride’s credit is a question mark.
Where to find it
Other ways to get it: Apple TV · Find where it’s streaming — JustWatch
More Frankensteins: Frankenstein (1910) · Frankenstein (1931) · The Curse of Frankenstein (1957)