The reading
The bead. A father who has already lost almost everything crosses an whole ocean to get his son back, and learns that protecting someone means being able to let them go.
Engines
- homecoming/reunion · content · spine · ~ — the film is a reunion: father and son separated in the first minutes, and the whole journey is the crossing back to each other; the payout is the family made whole again.
- caretaking/being-needed · content · also-runs · ~ — Marlin's overprotective love is the engine of the quest and the thing the arc has to temper — to care without caging, to be the parent Nemo needs rather than the one who smothers.
The bundle. A reunion spine driven by a caretaking arc — the parent crosses the world for the child, and is changed by the crossing.
Dual-use read. Caretaking's counterfeit is the smothering, control-as-love version that keeps the cared-for helpless to stay needed; Finding Nemo names it directly (Marlin's fear nearly costs him Nemo) and pays out the guard — love that lets go.
Verdict. The parent's-love film par excellence: a homecoming/reunion built on a caretaking lesson.
Evidence. ~ reviewed — from the film (in-copyright).