Ashley Tisdale? Jimmy Smiths? Joel McHale?

As if the developments that closed out Sons of Anarchy Season 4 weren't enough to whet the appetites of fans for this fall, the FX drama went ahead and signed up a series of intriguing guest stars.

How will each play a role going forward? Just how dark might things become? Is there any chance of a SOA musical episode? I asked all these questions and many more to one of our favorite casts at Comic-Con last weekend. Read/watch on for a rundown of exclusive red carpet interviews...

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Let's start with Mr. President, Charlie Hunnam. What about the addition of Tisdale has this actor so worked up? It's not what you might think:

As for his First Lady, Maggie Siff gives us an idea of how her man's promotion will affect her character's relationship with Gemma:

And what kind of state will Gemma find herself in? How will she be dealing with her status as an outside? On word, Katey Sagal tells us, alcohol:

Why the selection of Tisdale? How will Smits fit in as Nero? Creator Kurt Sutter shoots down a Community crossover and tells all:

Warning: Tig will be off the leash on Sons of Anarchy Season 5. So warns Kim Coats in this one-on-one:

Yes, Opie will return. Where will his mind be? Ryan Hurst teases his character's arc:

Ron Perlman wasn't certain he'd still be around this season. What can we expect from an injured, thwarted Clay going forward?

Tommy Flanagan, meanwhile, talks up a promotion for Chibs and how his new role in the club will affect his actions and relationships:

Finally, Theo Rossi is coming off an incredibly dark turn as Juice. Any chance things lighten up for the former diaper-wearing biker?

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