He can be traced to his resting place during the daylight hours, and there staked through the heart. He can be exposed to the direct rays of the sun. Running water will drown him. The cross will burn him. He is not invulnerable.
16 seconds sound clip from the Dracula: Prince of Darkness movie soundboard.
You can hear this line at 01:03:46.243 in the Blu-ray version of the movie.
Quote context
[...]
- I thought we'd seen the last of him. The last record we have of him is... Here it is. Ten years ago.
- Not kill. He is already dead. He is an undead, Mr. Kent. He can be destroyed, but not killed.
- You make it sound comparatively simple.
- To skin a cat, first catch it.
- It is not simple. On the contrary, it is an extremely difficult and dangerous undertaking.
[...]