Andy and Luke are engaged. But sparks of a different kind will fly on Rookie Blue this Thursday.

A slew of arson-related fires will culminate with the burning of a laundromat on "Heart & Sparks," an event that leads Chris and Gail to the streets and into an encounter with a man from Chris' past.

Elsewhere, Andy will end up trapped in an unstable building, as a basic arson case grows into so much more...

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