Karkaroff looked up at the cabin door when the knock came; doubtless it was Viktor, back to report on the third task.
However, the booming voice that accompanied the second knock was definitely not Viktor's.
"Professor Karkaroff?"
With a flick of his wand, Karkaroff unlocked the door; it swung open to reveal the Hogwarts gamekeeper squeezed into the outside corridor.
"What is the meaning of this?" Karkaroff asked, both annoyed and surprised.
"Yeh'd better follow me," the giant man said. "Professor Dumbledore wants ter see ya...somethin' abou' yer champion..."
"Viktor?" Karkaroff stiffened. "Is something wrong?"
The gamekeeper didn't answer.