Rookie Blue is back and, based on a surprise shooting last week, more intense than ever.

What will Thursday's "Might Have Been" deliver?

• Andy and Gail will go undercover as part of a drug bust.
• Traci will find herself drawn back to Detective Barber.
• A complaint will be filed against Dov.

Watch the official trailer now:

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