Nobody should be planning on fleeing Comic-Con early to beat the traffic.
 
Comic-Con Sunday, occasionally empty and occasionally busy, is packed on the TV side this year with beloved stars, fan favorites and Comic-Con first-timers.
 
Obviously highlights include the triumphant return of Tom Welling to celebrate the finale season of "Smallville," the always engaging Nathan Fillion talking up "Castle," the Ballroom 20 debut of "Glee" and the gang behind "Sons of Anarchy."
 
Here are some (but not all) of the Sunday Comic-Con standouts:
 
"Smallville"
10:00 - 11:00
Ballroom 20
Who: Star Tom Welling, plus co-stars Eric Durance, Cassidy Freeman and Justin Hartley, will be joined by showrunners Kelly Souders and Brian Peterson. 
Lowdown: This will be the 10th and final season of "Smallville," so what better way to send the series off than with a Ballroom 20 panel kicking off the day?
 
"Castle"
10:30 - 11:30
Room 6BCF
Who: Nathan Fillion and Stana Katic will be joined by "Castle" creator Andrew Marlowe and executive producers Rob Bowman and Laurie Zaks.
Lowdown: We just listed five people, but it's Fillion's presence that guarantees a packed room and, in all likelihood, a rollicking panel.
 
11:15 - 12:15
Ballroom 20
Who: The schedule mentions producers Sera Gamble, Ben Edlund and Eric Kripke and then coyly says "cast members."
Lowdown: We doubt that Jared or Jensen will be there, but Misha Collins seems like a safe bet, doesn't he? Whoever's there, the discussion will likely hinge on how the blazes "Supernatural" is going to top its epic fifth season.
 
"American Dad"
12:30 - 1:15
Ballroom 20
Who: Producers Seth MacFarlane, Mike Barker and Matt Weitzman and cast members Dee Bradley Baker, Scott Grimes and Rachael MacFarlane.
Lowdown: If you leave your seat, it's a guarantee 50 GLEEks will fight to the death over it. So just stay seated.
 
"Unnatural History"
1:00 - 2:00
Room 6BCF
Who: Series stars Kevin G. Schmidt, Jordan Gavaris, Italia Ricci and Martin Donovan, plus creator Mike Werb.
Lowdown: The team behind Cartoon Network's first live-action mystery series will screen an episode. Mostly, we're amused by a Comic-Con panel with Martin Donovan, whose Hal Hartley films somehow never made the cut for the Con.
 
"Glee"
1:30 - 2:30
Ballroom 20
Who: Producers Ryan Murphy and Brad Falchuk will be joined by stars Chris Colfer, Amber Riley, Jenna Ushkowitz, Kevin McHale, Mark Salling, Heather Morris, and Naya Rivera,
Lowdown: Last year, "Glee" did a good job of filling a small room at the hotel next door. This year, Comic-Con organizers are assuming the FOX musical sensation will be able to fill Ballroom 20. They're assuming correctly. 
 
"Sons of Anarchy" and "It's Always Sunny in Philadelphia"
2:45 - 3:45
Ballroom 20
Who: Charlie Hunnam, Katey Sagal and Ron Perlman, plus creator Kurt Sutter, will represent the "Sons of Anarchy" team, while the whole "It's Always Sunny" gang -- Charlie Day, Rob McElhenney, Glenn Howerton, Kaitlin Olson and Danny DeVito -- will be on-hand.
Lowdown: We don't know whether we're more excited for this panel dedicated to two of our favorite FX shows or just to see how much audience overlap there is between "Glee" and "Sons of Anarchy." It should be a terrific way to end Comic-Con 2010.
 
 
Comic-Con International runs from July 21-25 at the San Diego Convention Center. Unfortunately, all passes are currently sold out.
 
Look for continuing updates on Comic-Con 2010 before and during the annual pop culture extravaganza on HitFix.