Kurt Sutter told E! Online that storylines featuring Jax (Charlie Hunnam) will climax in the episode.
"This finale is what we've been building to all season, which is what finales tend to do, obviously, but in this case especially for Jax," he said.
"This is about the emotional ride that he's been on all season and that has obviously impacted him and continues to influence him in the decisions he makes and the kind of man he's going to become."
Sutter also suggested that the events of the finale will have a big impact on Jax.
He said: "I think we reveal in the finale that he makes some pretty severe choices and orchestrates them, and I think they are choices that will change him forever."
The season finale of Sons Of Anarchy airs tonight at 10pm on FX.