The complete third season of the dark and gritty Space Station based drama which opens with a bang as the war between light and dark starts in earnest. In 'Matter of Honour', Captain Sheridan must take the Minbari/Vorlon vessel 'The White Star' to break the Centauri siege of the Rangers' training world - the base for the forces of light in their battle with the awesome Shadows. Meanwhile, Londo concludes his dealings with Morden, the human emissary to the Shadows. In 'Convictions', the station is under threat from a mad bomber and an explosion traps G'Kar and Londo in an elevator together - offering G'Kar the opportunity to kill his sworn enemy. In 'A Day in the Strife', the Centauris send a representative to the station to watch over the Narn inhabitants and force G'Kar back to the homeworld. Londo decides to send Vir to Minbar to work as an ambassador, while the Babylon 5 crew realise that they are being scanned by an alien probe that intends to destroy it. In 'Passing Through the Gethsemane', Lyta Alexander returns to the station to become Kosh's aide, and Brother Edward (a member of Theo's order) discovers that he was once a criminal, and has had a personality transplant. In 'Voices of Authority', the Forces of Light use the Great Machine on Epsilon 3 to locate the First Ones. Meanwhile Ivanova and Marcus have to travel to a distant point in the galaxy to make contact, with the result that Ivanova has a telepathic brush with the Shadows. Back on the station, the influence of the Nightwatch strengthens and evidence of Clarke's involvement in Santiago's assassination is made public. In 'Dust to Dust', Psi Corp's Bester returns to the station to track down an illegal source of the telepathic-enhancing drug Dust. G'Kar takes a dose, attacks Londo, is imprisoned, has a revelation and starts writing a new holy book for his race. In 'Exogenesis', the wayward inhabitants of the area of the station known as 'Down Below' start to behave like model citizens. Meanwhile, the awesome Shadow fleet starts to mass on the edge of Centauri space - either ready to strike out or waiting for a more terrible purpose. In 'Messages from Earth', the projected five-year storyline takes a dramatic turn as a three-part mini-arc begins. An agent smuggled from Earth onto the station reveals that EarthGov are planning to merge a human subject with a dormant Shadow vessel found on Ganymede. To avert the potentially catastrophic events, Sheridan dispatches the White Star to Jupiter to attempt to destroy the menace. From now on in, things take a rather dramatic and shattering course. In 'Point of No Return', corrupt President Clarke declares a vicious martial law on Earth and the 'Nightwatch' force conspires to take control of the station. Captain Sheridan chooses drastic measures to keep the station under his control. Meanwhile Londo hopes for a prediction from a visiting Centauri dignitary and, after his quasi-religious experience, G'kar believes he has something to offer Sheridan's over-stretched team. In 'Severed Dreams', EarthGov send a fleet of powerful ships to retake Babylon 5 from Sheridan and his crew, while on Mars, several colonies declare themselves independent from Earth. In 'Ceremonies of Light and Dark', the Nightwatch hatch a plan to destroy the fragile Alliance of Non-Aligned Worlds by assassinating Delenn, and Londo meets with Lord Refa, urging the latter to break links with Morden and his 'Associates'. When Refa refuses, Londo plots his downfall. In 'Sic Transit Vir', Vir is presented with a Centauri woman who is to be his bride, while Ivanova finds that he has been passing Narn refugees through the station. Londo is delighted to find that Vir has been having them all killed - or so it seems. In 'A Late Delivery from Avalon' a man claiming to be 'the Once and Future King', King Arthur, turns up on Babylon 5, but it seems he is actually a weapons officer from the ship that started the Earth-Minbari War. In 'Ship of Tears', Bester returns to the station with shocking news - The Shadows are in league with President Clarke and there is a shipful of weapons components en route to them. Sheridan orders an attack on the transport and reveals a grisly secret while finding a chink in the Shadows' armour. In 'Interludes and Examinations', Sheridan and Delenn try to form an alliance of non-aligned worlds, but need the Vorlons to take some positive action. Sheridan convinces Kosh to act, but the Vorlon ambassador warns the Captain that there will be a price to pay. Meanwhile, Mordern plots to kill the love of Londo's life and put the blame on Lord Refa. In 'War without End (Part One)', Sheridan joins Commander Sinclair and Delenn in a treacherous mission to evacuate Babylon 4 (last seen in the first season episode 'Babylon Squared'), and stop the time shifting station from being destroyed by the Shadows in the last great war over 1000 years ago. While on the stricken station, Sheridan finds himself jumping through time where he sees a terrible sight. In 'War without End (Part Two), Sheridan sees more of his future where he sees Londo as the Centauri Emperor, but under the control of something unpleasant. Back on Babylon 4, time paradoxes unfold as Sinclair sees Zathras captured by the Sinclair of two years ago, and then Sinclair travels back in time to the time of the last Shadow War to take his place as Valen, the Minbari leader who set up the Grey Council. In 'Walkabout', Doctor Franklin faces his addiction to stims while Kosh's replacement arrives, holding Lyta Alexander to blame for his predecessor's death. Lyta proves that she can cripple Shadow vessels using her Psi talents. In 'Grey 17 is Missing', Garibaldi discovers a hidden level of the station occupied by a weird religious sect. Meanwhile, Neroon denounces Delenn's appointment as Ranger One, and Marcus is prepared to lose his life in her defense. In 'And the Rock Cried Out No Hiding Place', Londo plans to be rid of G'Kar once and for all, but Lord Refa hijacks the plan - a move that he might well regret. In the war room, Sheridan discovers the awful truth about the Shadow's strategy. Z minus 10 days. In 'Shadow Dancing', Franklin gets stabbed, Marcus and Ivanova take a fleet of White Stars to a point where they believe the Shadows will strike (and they are not wrong) and Anna Sheridan comes back from the grave. By now, as everyone knows, if Sheridan goes to Z'Ha'Dum, he will die. In the cliff-hanging season finale 'Z'Ha'Dum', Sheridan, with Kosh's warning still ringing in his ears, travels to Z'Ha'Dum with his wife to get to the bottom of the conflict. The episode ends with a stunning and shocking denouement.