Here’s my recommendations:
Poetics by Aristotle
The Hero with a Thousand Faces by Joseph Campbell
The Writer’s Journey: Mythic Structure for Writers by Christopher Vogler
Screenplay: The Foundations of Screenwriting by Syd Field
Story by Robert McKee
Save the Cat! by Blake Snyder
The 21st Century Screenplay by Linda Aronson
Doctor Who: The Writer’s Tale: The Final Chapeter by Russell T Davies and Benjamin Cook
The Insider’s Guide to Writing for Television by Julian Friedmann and Christopher Walker
If you know of others that have really helped you, let us know by adding a comment.