<P> Two of the triplets (the third triplet was stillborn) and Randall (who had been left at a fire station) are all born on Jack's 36th birthday . Jack always wanted to find out who Randall's biological father was, and never knew that Rebecca had found him . </P> <P> Jack struggles with alcoholism while the children are young, but he stops drinking to focus more on his family . (Sometimes he vents his anger on a punching bag to avoid drinking after a tough day .) However, he relapses into alcoholism when he has a drink after a disagreement and argument with his wife, who wants to go on tour with a band with a member she'd once dated . His drinking continues for some time until he decides to deal with the problem by attending AA meetings . His sobriety and AA work continue for at least 6 months . </P> <P> Jack dies when his children are 17, and Kate keeps his ashes with her . On the night of the Super Bowl, Jack, Rebecca, Kate, and Randall go to bed for the night (Kevin is at a party with his girlfriend Sophie). Previously, a smoke alarm was shown to be missing batteries, and thus was inoperable . An old slow cooker given years previous by a neighbor is shown to have a faulty switch, which sparks and flames, setting a towel and the house ablaze . </P> <P> Jack saves Kate and Randall from the fire by guiding them to his and Rebecca's bedroom . He then hoists them down from the first story roof . Kate is worried about her dog, so Jack goes back inside and gets the dog and family pictures . Jack is hospitalized for smoke inhalation, which causes stress on his heart and eventually causes fatal cardiac arrest . </P>

Who plays rebecca's high school boyfriend on this is us