The headrest cover behind the EPA guy's head on the train with Maggie Jordan goes from beginning to slip to suddenly straight without a reasonable break in the conversation for it to be corrected by the EPA guy or an attendant.
When Jim Harper is in the bar with Hallie Shea after she has been fired, he reads the Twitter message that she posted as, "Just left ACN for the last time. Great five weeks. Honest people. Sensational experience. One regret. I tweeted a terrible joke on the network's account. No one else involved." This message is 175 characters, however, Twitter limits messages to 140 characters. Since it is being read out loud it is impossible to know which words may have abbreviated, but the message is significantly longer than the Twitter limit.
Assistant Attorney General Barry Lasenthal states that when he played football at A&M (presumably Texas A&M since Nebraska has never played another "A&M" school in football), his team lost to Nebraska all four years he was there. While there were two winning streaks where Nebraska beat A&M at least four times, neither occurred over consecutive years.
The character Maggie is seen on a train ride for most of her scenes in the episode, she is traveling alone from Boston back to New York City. The train car shows groups of four seats grouped together, then another group of four seats, and so on. When seeing the back-to-back seats, it's obvious that they are airplane-style seats due to the retractable tray tables being visible.