Charlie may not be showing up much on Lost, but he's having a fountain-pissing good time on Chuck. Here's the first video of Dominic Monaghan as Tyler, a snotty rockstar, in the Feb. 2 episode.
In "Chuck Vs. The Third Dimension," Chuck has to protect Monaghan's rock star from evil spies. Which reminds me: we reviewed a big chunk of the script for this episode ages ago.