What Is A 'Dual Narrative' In Screenwriting?

This was a bit more difficult than anticipated but I think it's pretty digestible at the end of the night.
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[@billelliott3507]

This was incredibly helpful and informational. What you said about both narratives being self reliant is defientely something I'm going to pay close attention to. I'm currently working on a murder mystery, with a dual narrative. I haven't worked it all out but essentially, the first narrative is at the beginning of one detective's career (from his pov), and the other narrative is from a private detective's POV who up until this most recent murder has worked in tandem with the detective from the first narrative. These two stories are set about twenty years apart, and the main mystery is who this killer is (both narratives seek to solve this) but also what changes in the first detective's life make him not want to help the detective in the second narrative. The first season or story ends with the first detective unveiling a cult in the town where the first murders happened, and being forced by threat to his newborn to help them cover it up. The second detective's story ends with him finding a cave that he believes will hold the answer to the mystery, and returning with a dead child he failed to save. The main arc for both of them is that they both are trying to do what's right, but are broken because they failed to realize the scope of the evil they face. the next seasons or stories would be set in the present showing how this brokenness leads them to an ultimate low, and would end with how they can eventually rise up and be greater than the evils that had broken them, and how the consequences they have to live with.

[@lowriters]

That's a very interesting set up! Kinda jealous (in a supportive way) I didn't come up with it myself lol
I would say as long as there is a clear theme to connect the two or the two characters have contrasts that really compliment each other (even tho they are on separate narratives) in a way that allows the audience to discover something meaningful about their journeys, I think you'll have a real home run here.
I guess an idea to mull over is maybe the methods each uses is technically the right method but wrong case. In other words Detective A would be successful if he was on Case B and Detective B would be successful if he was on Case A but by sheer cruel fate they are doomed to be where they're at and the audience can discover this as the narratives "wrap up". Almost like a tragedy. I hope that makes sense lol