Jeff Jensen of EW.com posted an interview with Damon Lindelof & Carlton Cuse, one that was specifically focused on the new characters that we will be seeing in Season 4, it’s definitely worth a read and here are the highlights:
*All of the characters will be appearing in more than one episode, and it sounds like most will be appearing at least throughout Season 4 and into Season’s 5 & 6; so some of them will be of importance to the overall story arc for the final 3 seasons
*The descriptions we have seen to date are not necessarily accurate:
CARLTON CUSE: We actually [have] the actors read fake [scenes] and give them fake character names because those casting [pages] travel so widely, there’s no way to maintain secrecy. So we basically have to come up with fake but analogous scenes that will show us qualities of an actor but won’t give away what the role is. So yes, the stuff out there is not totally accurate.
DL: In fact, only one of the character names that has gotten out there is literally accurate.
*Rebecca Mader’s character will be of English descent:
DL: What was really cool about Rebecca’s [audition] read was, she did it on tape, but the producer who was with her asked her, ”All these things on your résumé are from the BBC — are you British?” She said yes, and we asked her to read it again, this time as a Brit, and it opened up another dimension we hadn’t foreseen. Now she’s English.
So her Lost character is English?
DL: Now she is.
*Finally, regarding Fahey and his beard:
Amazing. Something to follow up on. On a slightly more superficial front, the most recent pics of Fahey have him sporting a very bushy beard. Are you going to have him shave?
CC: Honestly, we don’t know. We’re meeting him for lunch this week, and our understanding is that yes, he has a beard. But we have no idea if the beard is on the table — and frankly, I want to see it. Because given the character we have in mind for him, a beard just might work.
So, in summary, very little information that has leaked at this point can be trusted, but of these characters it would seem that Fahey could perhaps end up being the most important. Some of the other parts were written with the specific actors in mind, and in the case of Lance Reddick, they had actually evaluated him for the part of Eko initially, so there could be a potential connection with his new character.