Charles Hallahan was an American actor whose career encompassed film, television, and theatre over more than three decades. He appeared in notable films including The Thing, Silkwood, Twilight Zone: The Movie, Highlander, Dave, and The Pelican Brief, earning recognition for his authoritative and versatile supporting performances. On television, he had recurring and guest roles in series such as Hunter, The Practice, and Dallas. Respected as a dependable character actor, Hallahan built a distinguished career portraying military officers, public officials, and other commanding figures across a wide range of productions.