River Song felt many feeling flow through him as the Dalek that killed his precious Doctor approached him. "Records indicate you will show mercy; You are an associate of the Doctor's." The Dalek stated, but river picked up an emotion in its supposedly emotionless existence: He heard fear. He enjoyed hearing that shred of terror lace the Dalek's choppy mechanical voice. River grinned murderously, and set his gun to the one setting that he deemed suitable for this particular Dalek; kill. "I'm River Song, check your records again." He nearly growled at the alien, a mask of seriousness covering his face. "Mercy!" The Dalek cried. River's glare intensified. "Say it again." River commanded in a tone that would have frightened the Master, had he been there. "Mercy!" The Dalek pleaded once again, sounding even more desperate and frightened. "One more time." River dared the mechanical alien. "MERCY!" The Dalek screamed one last time. "Where's the Dalek?" Amy asked River as he walked out of one of the museum's hallways and right past her and Rory. "It died." He replied coldly and proceeded to walk in the opposite direction of the two humans.