Who from William's past showed up to cause some drama?
That was a key question on This Is Us Season 1 Episode 10 when William's past was explored.
Elsewhere on this addictive drama series, Kate went forward with her big surgery in the hopes of getting better.
Also, the Pearsons discovered Dr. K alone at the hospital on Christmas Eve after Kate was afflicted with appendicitis, but what did they do as a gesture of kindness?
Use the video above to watch This Is Us online to get caught up with the latest developments for the characters.
Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.