After last week's episode fans have created a new theory. Warning for those who are not caught up in the series, don't read any further.
Last week's episode which aired February 21, Randall (Sterling K. Brown) comforted his biological father, William (Ron Cephas Jones) as he passed away from cancer. Randall was very concerned and wanted a nurse in his father's room during his passing to ensure his father didn't "die when nobody's lookin'."
This remark left fans thinking that Jack died alone... and that's why his kids find it so hard to talk about it. Is that why Randall was so determined to have William pass in his and a nurse's presence?!
Tonight's episode might answer that question!