It Came!
"they're TRAPPED, they're DUMB, they're DEAD!"
Electrical overload at the Throbbing Video Company office alows an alien force into the phone lines. The force becomes a sound wave and enters the body of an electrician who then goes on a rampage. When the electrician is killed, the force transfers to another body and so on.
Directors: Bret Stern
Writers: Peter Vitale, Phil Beloin, Steve Arthur
IMDB: tt0261753