The film 10000 km (Wikipedia, IMDB, Mubi) is about a couple with a long distance relationship between Barcelona and Los Angeles. It is almost entirely shot in two apartments, and throughout the film I've noticed that there are only two actors. There aren't even any walk-ons. Therefore I was surprised to see that IMDB lists a third actor, a "Friend of Alex". In what scene of the film do we see or hear him or her?