S4·E15 The Night of the Winged Terror (1)

After a series of disturbing incidents involving a raven that seems to hynoptize high-ranking officials into committing dastardly deeds,Agents West and Harper decide to find out what's going on. The incidents lead the new partners to a group calling themselves The Raven,led by Thaddeus Toombs and a man called Tycho (who has an enormous head and is very smart).