Magnetic organism

From Memory Alpha, the free Star Trek reference

The magnetic organism is a malevolent lifeform encountered by USS Enterprise in 2269. It had been trapped by the intense magnetic field of Questar M-17 for 300 million years. It had the ability to create a symbiotic connection with electromagnetic systems like those of a starship. The organism planned to use the Enterprise to break orbit and head for the galactic core in the hopes of taking over the galaxy. It had originally planed to use the insectoid ship for this purpose, but its crew destroyed the ship to prevent the organism's escape. (TAS: "Beyond the Farthest Star")

"You will obey me."

"And if I refuse?"

(the organism shoots Kirk using the automatic bridge defense system)

"Obey me!"

- magnetic organism and Kirk - Listen to this quote^file info

The magnetic organism was voiced by James Doohan.