VOY Season 1

Janeway brings Jetrel on board and he explains that he has been working on the effects of the cascade ever since the war. He has been locating those who were on the moon after the cascade in order to check them for metremia, and believes that Neelix may be affected. Neelix initially refuses to be examined by Jetrel, but eventually relents and allows the examination to take place. Jetrel confirms that Neelix received enough of a metreon dose to cause terminal metremia. Jetrel tells Janeway he may have a way to cure Neelix and the other survivors, but to complete his work he needs a sample from the atmosphere of Rhinax. Voyager sets off towards the Talaxian system, which is apparently fairly close by. Neelix and Jetrel have several confrontations about the lather's role in the war; Jetrel claims that he was not responsible for the use of the Cascade on Rhinax, it was the decision of the military. He says that he has suffered also because of his work - his wife left him, taking the children with her, because she believed that he had become a monster. Neelix tells his own story - after the Cascade he had gone to Rhinax to look for his family. While there he came across what he first thought was some kind of monster - until it spoke and he realized it was a young girl, Palaxia, who had suffered from horrible injuries in the many fires caused by the weapon. Palaxia was taken back to Talax where she slowly withered away and died. Neelix asks Jetrel if he has considered the possibility that he really did become a monster, and Jetrel agrees that when he first saw the Cascade tested he had the same thought. Neelix hopes that he has to live with that knowledge for a long time, but Jetrel says he has metremia himself and will soon be dead.

Later, Neelix suffers from a terrible nightmare in which he sees Kes injured in the same way that Palaxia was, and an image of himself who accuses him of being a coward. Kes finds Neelix hiding in the darkened mess hall and he tells her the truth about the war; he thought it was unjustified, so refused to fight. Neelix believes he is a coward and has carried the guilt ever since. Kes tries to convince him that refusing to fight is itself a form of bravery.

When Voyager arrives at Talax they beam a sample of the cloud into sickbay. Jetrel deactivates the EMH and uses the sample in a machine which grows some kind of life form out of it. After a while Neelix arrives and when he sees the thing he accuses Jetrel of carrying out some kind of bizarre experiment. Jetrel grabs a hypospray and sedates Neelix before leaving sickbay.

When the EMH is reactivated he explains to Janeway what has happened. Tuvok detects Jetrel in the transporter room, and a security team is sent to capture him. When questioned by Janeway Jetrel admits that Neelix never had metremia poisoning - he had lied in order to gain their help. He explains that the Cascade vaporized its victims in a manner not dissimilar to transporter technology, and he believes that it may be possible to re-integrate the fragments to re-create the victims. He has collected DNA samples belonging to many of those who were killed by the Cascade and was trying to use Voyagers transporter to scan the cloud, locate all the cells with that DNA, and bring them back together. Janeway is highly doubtful that it could work, but Neelix begs her to try so she agrees to make the attempt.

Initially the results look promising - a figure begins to form on the transporter pad. However, the material is just too scattered and randomized and the process cannot be completed successfully. Jetrel collapses and is rushed to sickbay.

In the final scene of the episode, Neelix confronts the dying Jetrel in sickbay. In an emotional scene he tells him he has something to say - "I forgive you". Jetrel dies moments after hearing the words.