In the Farscape episode "My Three Crichtons", John Crichton is seemingly assaulted by an enigmatic alien life-form that envelops him in a sphere of energy. When he emerges, two alternate versions of him also appear, one of them resembling an ancient pre-human Neanderthal. This version of Crichton is also played by Ben Browder and is named behind-the-scenes as "Neandro".
In spite of his appearance, Neandro was certain that he was Crichton and attempted to wear Crichton's old IASA uniform, a notion Crichton himself found absurd. Chiana, however, saw in Neandro all of the aspects that she loved in Crichton and became close to him. When the sphere demanded one of the three Crichtons be placed into it or Moya would face destruction, Chiana allowed Neandro to escape before the other two Crichtons could choose to sacrifice him. Though Crichton eventually tracked down his similar self, he realized he could not allow himself to force Neandro into the sacrifice and let him go. Crichton confronted his future version, who held John at gunpoint in order to force him to enter the sphere. Neandro ambushed the other Crichton, however, bludgeoning him over the head with a pipe and killing him in the process. Though the dead Crichton would be sufficient, Neandro chose to enter the sphere as well, something assumed to be a suicidal decision. In his limited dialect, Neandro stated he wanted to go as he knew that he had no place on Moya.