Presentárselas

Presentárselas
 

voy a presentárselas a todos

translated as
I am going to introduce her to everybody.

Why selas and not sela?

In this translation, the two pronouns represent 'her' and 'everybody'. Spanish grammar dictates that 'se' be used (to avoid the awkwardness of two pronouns beginning with the same consonant), and that 'se' precede all other pronouns.
Since 'se' must be representing 'a todos' (all male or a mixed group), 'la' should represent the English pronoun 'her'.

With "presentárselas" you're supposed to be introducing two or more women.

Thanks that is what I thought. It could be a mistake in the subtitle text. Probably a bit hard to hear the difference.

There are colloquial or regional cases where the speaker sets the información de número in the wrong pronoun because, for instance, they consider se to be ambiguous and insufficient.

-No te olvides de decirles que vengan temprano
-Ya se los dije.

información de número: correct / wrong

OK Thanks yes that sounds like the what could be going on, this is Argentinian. They could not get the plural to indicate with the "se" so put in the "las" instead - great.