The third film in the Father and Son trilogy is The Three Spears, and it's a bit different from the other two. In The Three Spears we watch Nick grow from a tender three-and-a-half year old into a lively six year old - with all the glorious developmental bases touched.
The third character in The Three Spears is Nick's grandfather, whom we meet on the morning of his 86th Christmas Day. Nick's Dad is now the son here, as we see the developmental changes of very old age interwoven with the maturation of the young Nick. Flashbacks show the high points and challenges of a life well lived all the way to the end.
The Three Spears is the final film in the trilogy Father and Son.