There is a certain level of humor and frustration felt through the first half of this episode as Lucius returns. We find that he's cobbled an identity together based off of Sheppard to gain the fame and recognition he longs for.
The frustrating thing is that Sheppard, Rodney, Teyla, Ronon, and Carson have been heroic. They've saved towns, risked their lives for people who don't know them, been bruised and bled for countless others, and they've never gotten the kind of adulation Lucius is getting in this town. He's using Ancient tech and their stories. Praise is lavished on him. Yet the people who are actually heroic, actually the good guys get hardly a glance on a good day, and run out of town on a bad day.
And then, look, they go and be heroic anyway. No praise. No nothing. They try to tell the town the truth, and they get derided, but when Kolya shows up they make sure they're not risking the town. (After a minor John! from Teyla.) They all try to die for Rodney. Sheppard not only saves his team but helps the town stand up after telling Lucius not to try and be a hero, because he knows that's dangerous.
It starts out frustrating to see them unacknowledged yet again, and then reminds us who and what real heroes are. Also, we get the cathartic moment of Sheppard finally putting Kolya down and ridding the Pegasus galaxy of that constant danger. Can you imagine? After the torture, Todd, and what Kolya put Weir through, to finally see him go down? Nice.
Also, this episode made me think of these: