Tear Jerker / If/Then

• Lucas's unrequited love and obsession for Beth, to the point that he wants to be a Love Martyr.
• "Hey, Kid," which triples as a Heartwarming Moment of Awesome Josh's solo as his wife goes into labor reflects his fear, disbelief, determination and joy:
  As a father, kid
  I may not have a clue
  But your mom and me will somehow muddle through
  If my asshole dad could do it - I can too
  In fact, I'll do better,
  I'll start new
• Because Liz never got the job of city planner, the deputy's nephew got the job. His terrible planning gets a child killed in traffic.
• "Some Other Me." For context, Lucas and Beth have a stressful conversation several years after they last talked, where he's upset that she aborted their child without telling him.
• Josh's death. Worse, Liz before he leaves has lots of Anger Born of Worry
  I love you
  I love you
  I love...d you!
• Just knowing that Lucas doesn't meet David in the Beth storyline.