"Supersymmetry"
David Boreanaz -- Angel
Charisma Carpenter -- Cordelia Chase
Alexis Denisof -- Wesley Wyndam-Price
J. August Richards -- Charles Gunn
Amy Acker -- Fred
Vincent Kartheiser -- Connor
Andy Hallett -- Host
Stephanie Romanov -- Lilah
Randy Oglesby -- Professor Seidel
Jerry Trainor -- Jared
Jennifer Hipp -- Laurie
| Season 4 Cast |