Venkman's Ghost Repellers

Peter's dad sells a product that he claims act as a ghost repellent. However, the product, which are actually plain and ordinary ponchos, prove to be useless against a ghost as simple as Slimer. Worse, when the Ghostbusters try to convince Peter's dad to stop selling them, due to the fact it is fraud and amoral, he sells them anyway to a science expedition that is out to investigate the New Jersey Parallelogram, apparently a 'smaller, nasty version' of the Bermuda Triangle, the expedition gets trapped in the Parallelogram. Peter's father, thinking he may be responsible, goes to locate them at the same time the Coast Guard contracts the Ghostbusters to help them locate the missing ship. When the Ghostbusters and Coast Guard get pulled into the Parallelogram, they eventually find the ship and are able to get it out. However, once out, they find Peter's father's speedboat, but he is not there. The boys go back into the Parallelogram in order to locate Peter's dad, finding him at the center of the supernatural structure battling a horde of ghosts. Their fight to save Peter's father results in damaging the interior of the Parallelogram, and the Ghostbusters barely manage to escape before the entire structure collapses into the ocean. Peter's father later sends Peter a postcard from Alaska.