Doctor Who The Twelfth Doctor #08

Part of the "broken" 2
On Earth, Section scientist John Foster was killed in an accident ... but in a parallel universe, his wife and daughter were killed, while in the world, John Foster survived. One thought kept that John is going through his grief - somewhere out there in some other reality, his wife and daughter still lives.
Work obsessively, Foster has developed a way to break the membrane of the multiverse and cross the void in our world, unaware of the horrors that follow in its wake ...
What darkness creatures live in the veins of the multiverse, stretching lure those foolish enough to break in your field?
Dr. Clara and about to face ... fractures!