With The Flash having recently seen Cisco Ramon literally flickering in and out of existence due to alterations to the timeline, not to mention the 2016 problems caused by Ray Palmer losing part of his Atom suit in 1975, Pilot Part 2 also throws up some serious problems for Martin Stein. Glancing down at his hands, Professor Stein notices that his wedding ring is phasing in and out of existence, much like Cisco was, and this is all because his younger self has had a change of plan on the night that hes supposed to meet his future wife. In this WTF moment, we were again shown how easy it is for the things taken for granted in the future to be so easily be altered by the smallest of changes in the past. But okay, we get it now. Lets try and explore some different plot points, yeah?