- "Nice speech David, but there's still a practical side to it."
- ―David Williams
|Portrayed by||Richard Denning|
Dr. Mark Williams is the leader of the expedition in Creature from the Black Lagoon. He is a financial minded man, who becomes increasingly aggressive throughout the film, wishing to kill the gill-man, and proving its existence to the world.
He is killed by The Creature, after fighting with him underwater.
He is played by Richard Denning.