The Excalibur is sent to rendezvous with a special courier for top-secret mission. Obeying Senator Jacob Redway and his companion, a rather bland plumber named David Williams, Gideon proceeds toward Earth. However, when the Excalibur encounters a disabled Starfury, Gideon decides to stop and rescue its nearly-dead pilot: Captain Elizabeth Lochley. After telling Lochley that he can't tell her anything about their mission, Gideon and Excalibur continue to Earth to pick up a very special person who will help them test the baseline for the Drakh plague: Dr. Stephen Franklin. But, as they begin to check the details for Dr. Franklin, Williams who will serve as Franklin's baseline makes a call. It's only to his sweetheart on Earth - but more than his sweetheart is listening to his transmission.

Two persecuted alien investigators believe that Earth is covertly invading them.

Gideon conducts an illegal raid to free a fugitive with information that could save Earth.

Galen warns Gideon not to explore a planet where the inhabitants were suddenly eradicated.

Gideon and crew find themselves attacked on a supposedly dead world. They race to find out who is attacking them and why.

Gideon must outwit an alien consciousness that takes over the Excalibur's crew.

The Excalibur goes to Babylon 5 so that Gideon can meet with an ambassador for permission to go to a planet that might have technology that can help Earth. But the ambassador refuses and Gideon is not going to accept it. Meanwhile, Ellerson runs into his ex-wife, who is in trouble with a loan shark. When he pays him off, he feels she owes him more and goes to great lengths to collect.

Gideon and Lochley must prevent a doomsday cult from killing everyone at a Virus Conference on Mars.

Gideon must take into custody a colony of renegade humans that may have been infected while escaping Earth. Meanwhile, Dureena finds a lost tribe of her people.

A mysterious sphere prompts Gideon and the others to relive traumatic moments from their past.

Galen persuades Gideon to seek a mystical crossroads. A Psychic investigator probes Lt. Matheson's mind.

Gideon mediates between Earth miners and the residents of a planet containing a virus-fighting mineral--and a fire-breathing dragon.

Capt. Matthew Gideon assembles the crew that will be with him on the experimental starship Excalibur. Their mission: explore the reaches of space to find a cure for the deadly Drakh virus that will overrun Earth in five years.