Questions & Answers about Aquella película me hizo pensar.
Aquella is a demonstrative adjective meaning that, but specifically something felt to be farther away from the speaker, either physically or emotionally/in time.
In Spanish, the three main choices are:
- esta = this
- esa = that
- aquella = that over there / that one back then
So aquella película suggests that film with a bit more distance, for example:
- a film watched a long time ago
- a film not closely connected to the current conversation
- a film being contrasted with something nearer
Also, aquella must agree with película, which is:
That is why it is aquella película, not aquel película or aquellos película.