I guess when the Fox execs sat around discussing the premise of Standoff, nobody realized that all hostage negotiations are the same, and that the show had written itself into a corner from day 1.
Having already run out of good ideas, the previous episode, "The Accidental Negotiator", featured a civilian doing the negotiation rather than the FBI, and doing a better job of it.
This episode sees Matt and Emily not only take a hostage, but shoot him also!
After blowing yet another negotiation with no perimeter set, the original hostage taker drives away and escapes to Mexico in a tunnel. Matt and Emily break the law and follow, for no good reason.
They catch their guy, their guy's gang surrounds them, and they end up trying to use their hostage to save their own lives (rather than just shooting the bad guys when Matt had a gun pointed at them).
Then Emily turns into a sobbing little girl. It was so easy to push her buttons, no way she would ever get into CNU. This was also completely out of character.
It was a good run, but clearly the only story ideas the writers have left are bad ones. They have already abandoned the whole premise of the show.