Question: is lucas on pretty little liars a?
Answer: 'A' is for A-l-i-v-e Although Lucas does not appear in the episode, Mona reveals that Lucas was the one who gave Emily the massage in "Touched by an 'A'-ngel". She notes he said Emily was tense. We don't know if Lucas was blackmailed into doing this or if he did it freely as a possible A-Team member.