According to Variety, NBC wants six more episodes of Chuck for midseason.

The show was almost cancelled last May, but NBC executives were "wowed enough by an aggressive campaign by the show's loyalists to keep it on the air."

This campaign had the fans purchasing hoagies at Subway.

Initially, NBC picked up 13 episodes of the show for midseason, and hadn't planned to bring the series back until March.

However, with Southland off NBC's roster it looks like Chuck could return as soon as January. Thus the third season of the show will now be 19 episodes.