← Previous Next → 2x12 Master Plan 4.47/5 (17 votes) First Aired: Aug. 13, 2012 on MTV Summary: Scott and his friends try to discover Gerard's master plan; Derek intends to use his own methods for a takedown.

Main Characters in this Episode

• Scott McCall
• Allison Ar…
• Derek Hale
• Lydia Martin

Guest Stars Stiles played by Dylan O'Brien (II) Jackson played by Colton Haynes Mr. Argent played by JR Bourne Coach Finstock played by Orny Adams Sheriff Stilinski played by Linden Ashby Dr. Deaton played by Seth Gilliam Peter Hale played by Ian Bohen Gerard played by Michael Hogan (II) Erica played by Gage Golightly Ms. Morell played by Bianca Lawson Melissa McCall played by Melissa Ponzio Isaac Lahey played by Daniel Sharman Boyd played by Sinqua Walls Ambulance Driver played by Justine Wachsberger Hospital Visitor played by Lauren Henneberg Kanima played by David Elson Deputy Brady played by Andrew S. McMillan More