Date not given: In a daring maneuver Trip is transferred from Columbia to Enterprise, where he averts the disaster by performing a cold start of the warp reactor while Columbia is maintaining the warp field. As the Klingon fleet under the command of Fleet Admiral Krell is approaching to eradicate the infected colony, Phlox is struggling to devise a cure for the viral infection, supported by the Klingon scientist Antaak. When they find a remedy that would actually take away the superior abilities from the Klingon Augments, they decide not to tell General K'Vagh, who oversees their work. With little time left until the fleet arrives, the last four healthy Klingons agree to test four different strains of the antivirus that Phlox has developed, of which three are lethal and only one provides a cure. Time ultimately runs out when the Klingons attack and Enterprise and Columbia are being fired on too, against Krell's agreement with Section 31. Archer beams down and allows Phlox to inject the antivirus in his body to speed up the procedure. Then Antaak beams the virus into the Klingon lead ship, forcing Krell and his men to stand down to be healed. The cured Klingons retain their flat foreheads and are said to pass them on to their children.

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