Josh is reeling from the news about Rita's death, on top of the fact that he was probably the last person to who she spoke, and not only that there is a possibility but high probability that it was suicide. Raquel has to decide how she will take the news in relation to her own depression. News of Rita's death colors Sarah's event - her way of expressing her Judaism - she who is already nervous enough in that she does not know if anyone will show up. In the process, Len unofficially lets her know where she stands in comparison to Una in his life. Also coloring the event is Ali and Leslie's on-going negotiation of their relationship.
—Huggo