"Be careful." The Doctor told River as he climbed down into the mysterious tunnels. "I tried that once, it's ever so dull." He replied. "If we need something, we'll just shout." The Doctor said to him. "Oh yes, 'cause you're quite the screamer." River said suggestively. He climbed down the ladder with a smirk. "Now there's a spoiler for all of you!" He shouted, as he listened to the Doctor stutter and protest saying that she had no idea what he was talking about.