This week’s Flash begins with a bit of a flashback (no pun intended for once). We see more events the night of the infamous particle accelerator explosion at STAR Labs. Interestingly I didn’t realize that Captain Cold/Leonard Snart had his trademark gun back then. In fact, I’m pretty sure I remember Cisco invented it after Barry got his powers as a way to stop him if he had to. So I guess this is somehow a ripple from Flashpoint, although that seems a bit thin since these events happened so long before Barry started time traveling.