The poster contest -- Someone whistling -- Breaking glass -- So this is art! -- The missing apple -- The missing stack of papers -- A queer friendship -- In flames -- Blue and scarlet -- The open window -- Irene is puzzled -- Judy is dismayed -- At the exhibit -- Impossible! -- Congratulations -- Confessions -- Through the magnifying glass -- Seven days of mystery -- Seven clues -- Kay's perfect alibi -- The search begins -- Down the ladder -- Nipped in the bud -- Irene's big chance -- Judy's talent.