Allen Halliwell is a minor character featured in the WB Network television series Charmed. Played by actor Patrick Cassidy, he appeared in the 1969 time-travel episode "Witchstock" in season six.
He is the husband of Penny Halliwell, the father of Patty Halliwell, and the maternal grandfather of the Charmed Ones,
Supporting Characters: Penny Halliwell • Patty Halliwell • Victor Bennett • Wyatt Halliwell • Elise Rothman • Dan Gordon • Kyle Brody
Villains: Christy Jenkins • Source of All Evil • Zankou • Rex Buckland • Hannah Webster • Barbas • Cole Turner • Source of All Evil • Shax • Wyatt Halliwell • Gideon • Evil Piper • Evil Phoebe • Evil Paige • Ashley Fallon • Alec • Inspector Rodriguez • Janna • Javna • Jayda • Hecate • Inspector Sheridan • Spider Demon
