The Ghost Tether is a device that works in conjunction with a collar. When affixed to a ghost, the device can forcibly draw the ghost to it.
As a precautionary measure, Egon Spengler affixed a collar to the neck of Shifter to make sure he wouldn't abandon them in a rescue operation. Peter Venkman held onto the device while he and Shifter infiltrated Ghost Town. Shifter later stole it and freed himself. The tether was used on Poso while Shifter activated the device and threw it into an open Ghost Trap. Poso was drawn from his hideout to the trap.
- On page three of Ghostbusters Volume 2 Issue #12, the Ghost Tether makes a non-canon cameo on the mini cabinet left of Melanie Ortiz.