Iroh in Book 3

In Book 3, Iroh is put in a fire nation prison. Zuko comes to visit twice, but only briefly. Little do the prison guards know that Iroh is actually exercising behind their back. Later, Zuko leaves the fire nation to help Aang. He comes to free Iroh before leaving, but Iroh has already busted himself out. Aang and the gang later meet up with Iroh on the day Sozin's Comet returns.