Don't forget there is another Data Head at the site where an away team beams to a planet and go back in time. To stop something bad happening. They meet Mark Twain who later goes back to his own time and retrieves Picard from the past. Data mentions to Geordie are we firing weapons at the planet ? Geordie replies Yes Data says it is important that we do not. Is that bead still there because I saw it in the final scene of the show.