White Noise - The Cloud Brother's Short Stories, #2

One professor. Two aliens. Three timelines. A yellow bathroom sponge could forever link their destinies and save our universe. Professor Maurice Masterson is Europe's head of extraterrestrial investigation and incomprehensible phenomenon. He's attended many séances where spiritualists claim to receive messages from the spirits. Part of his work is to keep an open mind and investigate such cases. So far in his career, he's exposed each testimony as a hoax.
But then his bodyguard declares an alien has possessed him; an alien with a mission to save our universe from imminent collapse. The alien needs help, involving a journey through space and time-and a yellow bathroom sponge.