Sendhil Ramamurthy (Mohinder) don't appear in this episode.

The odd knives that Edgar uses are called Kukris. They are Nepalese in origin, but are often called "Gurkha Blades" by their association with the Royal Gurkha Rifles, a subdivision of the British Army connected to the Empire's former rule over India, with a rich and storied history of its own.

Samuel Sullivan: My brother Joseph and I have had two families. The first one, well let's just say it didn't work out to well. Over the years, we made ourselves a new one. And it was to this family, all of you. And his hear really belonged. You see, a family is something Joseph and I needed. It offer us protection from the outside world. A world that never understood or appreciated what makes us different. There are others like us out there, in the shadows, in the light. Each grasping for a meaning in a world that won't accept them for who they really are. They like us are blessed, gifted with extraordinary abilities. And they like us struggle with finding their place in an ordinary world. Haunted by there past from those who had harmed them and keep them from their destiny. Every one of them deserves a chance to be who they really are. But to what end, what purpose? Here in this place, we offer salvation. We offer hope, we offer redemption. And one by one, they will come, to our side, to our family. And they will find their way home. And all who have gathered, will be strong. And all who have gathered, will stand in unison. I say it's time we find our way back home again. Find your way home, brother.

Angela: It's midlife crisis, that's all this is. Here's my suggestion. You go out and you get yourself a big expensive sports car and a younger woman with questionable morals. That's what your father did, and it worked for him.

Abilities Development
Samuel Sullivan: Samuel can manipulate earth and substances made primarily of earth with his mind.
Lydia: Working in conjunction with Samuel, she can generate tattoo pictures on her body and divine the identify of people so pictured.
Edgar: Edgar can move at superspeed.

Possibly related source concepts:

The excellent HBO series, Carnivale, was what I thought about when I saw this episode. This isn't to suggest that it will have much in common with that except the fact that a traveling carnival peopled by at least some individuals with more than normal human capabilities lies at the heart of both, but it does make one wonder if Tim Kring didn't get the initial notion from the HBO series, even if he made it his own from that point on. The presence of Robert Knepper in a key role in both strengthens this impression.

Edgar's abilities seem different than, but strongly reminiscent of, the George R.R. Martin shared universe Wild Cards character Mackie Messer. Those of you who enjoy reading as well as TV shows like Heroes may well enjoy this book series, which involves a world where people attain superhuman abilities thanks to an alien biological "weapon" which is released on earth. Much like in Heroes, they get these powers somewhat randomly. I consider this book series a possible/likely source of inspiration for Tim Kring. He's been original with it, but it does seem to have a similar "feel" somehow.