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Hello again, Jaime and welcome back to Just Answer!This is Cher, and it will be my pleasure to assist you with your Star Wars question today.I believe you are thinking of Grand Moff Tarkin, played by Peter Cushing. He is considered Darth Vader's equal and consults with him, and while he never really gives Darth Vader orders, he does tell him to release General Motti from his force-choke and to terminate Princess Leia.Emperor Palpatine, who is not actualy seen in the first Star Wars movie, but is referenced by Grand Moff Tarkin, who announces that the Emperor has decided to disband the Imperial Senate, can be thought of as Darth Vader's 'boss'. He appears for the first time as Darth Vader's 'master' in "Star Wars Episode V: The Empire Strikes Back", when he sends a holograhic communication to tell him of a 'great disturbance in The Force'. This may be what you're thinking of re: the hologram.I hope this helped!