Season 5 · Episode 10
Cable Girls
When the final phase of their escape plan is threatened, Lidia, Carlota, Marga and Óscar make a momentous decision together.

A set phrase issued as a warning, often by someone in authority. The verb atenerse (to abide by, to face up to) governs the phrase; the se is reflexive. Carries a clear threatening tone in official or semi-official speech.
Fixed idiomatic phrase signalling a point of no return. Very common in both spoken and written register across many contexts.
A boxing metaphor used broadly to mean being in a very difficult, almost impossible position. Colourful but widely understood.
A very common multi-purpose phrase. Context determines whether it means to take over a task, look after someone, or grasp a situation mentally (also 'to understand/picture something').
Colloquial phrase expressing taking a serious risk. Jugar → jugarse (reflexive) + la (the implied stake). Common in speech to convey high personal risk.
A practical phrase meaning to alert authorities or others. The dar + noun construction is very productive in everyday speech (dar un golpe, dar una vuelta, etc.).