Lost

The only member of the principal cast who didn't have to audition for a role was Terry O'Quinn, with whom J.J. Abrams had previously worked on the second season of 'Alias'.

The ornate tattoos on Jack's shoulder are Matthew Fox's own.

Josh Holloway was trying to cover up his Southern accent while shooting several of his first scenes in the first season. It wasn't until producer J.J. Abrams told him that the reason they cast him was BECAUSE of his accent that Holloway changed it. There are still some scenes left in the pilot where he doesn't use his Southern accent.