When they held hands on the beach as Walter's rocket took off.
Before Megan passed away, Walter built a rocket ship in an attempt to win a $15 million grant that he would put toward saving her. He won the prize after her death and, instead of turning in the rocket for the money, joined Team Scorpion on the beach to launch Megan's ashes into space.
In a touching moment, Walter admitted that he should probably open up more. #Waige held hands as they watched the rocket soar toward the heavens.
Watch "Dam Breakthrough" on CBS All Access.