An "explosive" summer finale of The Secret Life of the American Teenager is on the way Monday night.

So teases the following promo, but first viewers will have the chance to sit through a Labor Day marathon of this ABC Family hit. They can also click on the photos below, which are courtesy of the concluding episode, "Rules of Engagement," and which preview a few scenes from the hour:

[Photos: ABC Family]

Visit TV Fanatic first thing Tuesday morning for a detailed review, and check out the aforementioned promo now:

[video url="http://www.tvfanatic.com/videos/summer-finale-preview/" title="Summer Finale Preview"] [/video]

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