The biggest science-fiction crossover of all time continues, in STAR TREK: THE NEXT GENERATION/DOCTOR WHO: ASSIMILATION2! Captain Picard introduces the Doctor to his equally mysterious friend Guinan. She seems to know the TARDIS and about the Doctor himself. However Picard still seems to mistrust the Doctor but Guinan assures him the Doctor can be trusted. The captain learns of an attack on the planet Cogen V has been attacked by the Borg and Cybermen. So an away team of Riker, Worf, Data, and the Doctor, and the Ponds go to the planet. They learn the Borg and Cybermen have turned on each other and the Borg seek an alliance with Locutus of Borg. Captain Picard flat out refuses but the Doctor believes they should hear the Borg out.