At 36:30 the woman talking on her mobile once again passes in front of Central City PD as she does in almost every episode.
John Wesley Shipp (Henry Allen) previously portrayed Professor Zoom in Batman: The Brave and the Bold (2008).
When Iris states that even "in blackest night" there still remains hope is a nod to the Green Lantern mantra: "In brightest day, in blackest night, no evil shall escape my sight. Let those who worship evil's might, beware my power - Green Lantern's light!" The Earth-2 metahumans definitely fit into the category of worshipping the nefarious Zoom.
At 39:03 when Barry says "The Speed Force is with us." he is riffing on "The Force is with us" from the Star Wars universe .