Julian McMahon (born July 27, 1968) is an Australian actor. He is best known for his roles on Charmed and Nip/Tuck. Paranoia An entry-level employee at a powerful corporation finds himself occupying a corner office, but at a dangerous price—he must spy on his boss's old mentor to secure for him a multi-billion dollar advantage. You're Not You A drama centered on a classical pianist who has been diagnosed with ALS and the brash college student who becomes her caregiver. Chasing Sleep A college professor wakes up to find his wife has not returned home, then struggles to understand her disappearance.