Mercilessly, the third volume of Heroes comes to an end this Monday.

On the episode titled "Duel," viewers can look forward to the following scenes (all previewed below):

• Peter telling Nathan to destroy the Formula;
• Peter pointing a gun at Mohinder;
• Parkman telling Ando that he has to be careful with abilities;
• Sylar telling Claire to choose between her dad or grandmother.

Check out the clips below and then chime in on our affiliated Heroes forum to discuss this show's future:

[video url="/videos/volume-three-finale-clips/" title="Volume Three Finale Clips"] [/video]

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.