Randall struggles with jealousy and confusion after learning about William’s bisexual identity and his rekindled relationship with a man named Jessie. William eventually reveals he was distancing himself to spare Randall's family from the pain of his terminal cancer. Randall reaffirms that his home is William's home until the end.
This Is Us recap: Season 1, Episode 11 - Entertainment Weekly
Following his heart attack on Christmas Eve, Toby is diagnosed with an arrhythmia that requires surgery. Though he is initially fearful and resistant, Kate helps him decide to go through with the procedure. Before and after the surgery, the couple shares their first "I love yous," and Kate proposes to Toby.
The episode follows the Pearson family across two timelines, centering on the theme of making difficult sacrifices for the benefit of loved ones.