After Dracula said they would aid them, Dr. Jekyll somewhat felt relieved. That had been easy...too easy.
After Dracula spoke, a fourth voice appeared out of nowhere, and echoed throughout the throne room, "[i]That will not be necessary. For your lives will end right here and now...monsters[/i]" 
Dr. Jekyll looked around for the source as the voice spoke. She commented in shock and slight anger, "I know that voice...! Carew? Sir Danvers Carew?!"
The voice chuckled and echoed ominously "[i]Hello again...Jekyll[/i],"