The Barclay hologram of Inside Man is an interactive copy of Reginald Barclay sent to Voyager, which Ferengi intercept and reprogramme to lure the crew to their deaths for Seven of Nine's nanoprobes.
This hologram appears in the seventh-season Voyager episode Inside Man. The real Reginald Barclay designs it for the Pathfinder Project, intending it to be transmitted to Voyager with new engineering ideas.
A group of Ferengi intercept the transmission and alter the programme. The version that reaches the ship is far more confident than its creator and quickly charms the crew. It proposes opening a geodesic fold inside a red giant to bring Voyager home in moments, and supplies shield and inoculation schemes that supposedly make the passage safe. In truth the radiation would kill everyone, leaving the Ferengi to collect Seven of Nine's valuable nanoprobes.
Barclay and Deanna Troi uncover the plot on Earth, and the hologram's attempt to escape with Seven is stopped.