Firefly new episodes?

[Corwyn]

I just stumbled across 2 episodes I hadn't seen before.

13 - Trash
15 - Heart of Gold

Knowing that they initially only made 1 through 10 and the pilot, I'm left wondering where these came from..

 

[Assenpfeffer]

Someone more familiar with the show can probably better answer this, but as far as I've heard, there were 2 or 3 episodes which were made and ready to broadcast when the plug got pulled.

They will supposedly be on the DVD package whenever that appears.

 

[Dalin the Monk]

There were 3 episodes that were filmed but never aired in the US. The two you mentioned, and one called "The Message"

All three will be on the DVD set.