The Spanish series “When No One Sees Us,” beginning Friday on Max, is one of the better foreign-crime dramas in ages — focused, beautiful, sturdy but artful.

Ultimately, though, the show will come down to the chemistry between Mariela Garriga as Castillo and Maribel Verdú as Gutiérrez. The first episode doesn’t show the two of them interacting much, so the jury is still out there.