I am so happy that season 5 included much more Richard Alpert than in seasons past. I really hope he is considered to be a main character in the 6th and final season. I want even more Richard Alpert!
This episode "Whatever Happened, Happened", only shows him in the last 5 or so minutes but it's a VERY excellent 5 or so minutes. Richard takes little Ben to the temple to save him from death.