This and the last two episodes are simply amazing - three episodes which really push the story arc forwards. This episode offers an amazing display of character development and overall story development in one.
Delenn proves her valor, so does G'Kar, aber this episode is the final proof that Sheridan is destined for greatness. This single episode offers more than many excellent movies and completes Babylon 5's transformation from a mere space station with diplomatic importance to the pivotal place in the galaxy.
Sheridan the soldier becomes the leader who is required to retake Earth from an Adolf Hitler-like President Clark and to defeat the Shadoes once and for all.