B-4

Sing along: I-i-i-i-i-i-i-i ain't got no bo-o-o-o-o-o-o-o-dy...

Data, Lore and B-4: the good, the bad and the retarded. B-4 is another android constructed by Doctor Noonien Soong. He appeared in the abomination Star Trek: Nemesis and is just as stupid as the film is.

He was found by the crew of the Enterprise-E in pieces on a pre-warp planet and taken back to the ship to be assembled. They decide to transfer Data's memroy to B-4, obviously completely forgetting the disasters they faced dealing with Lore.

After Picard and crew become acquainted with Shinzon, it was revealed that B-4 was part of the clone's master plan and tries to break into the Enterprise's computers. He was caught and Data took his place in order to get onboard the Scimitar and rescue Picard.

At the end of the film, following Data's destruction aboard the exploding Scimitar, it was hinted that Data's programming still flows in B-4's circuitry and that, like with Spock, Data may return from oblivion.