Season 3: Episode 34: The Mask

Halloween is no treat for Maya when Finch gets her to wear an embarrassing costume to the office. Luckily, she meets her Prince Charming in an elevator. Meanwhile, Jack confesses to a dirty trick he played on a young impressionable Maya; and Elliott and Finch hatch a plan to find out if Nina's friend Binnie really exists. Finally, Finch claims he wasn't the least bit scared by Alfred Hitchcock's horror masterpiece Psycho, so Elliott sets out to prove he's lying.