Father and son.
Andrew adds so much dimension to the character of Foyle. Through Andrew we get to see beyond the unflappable, heroic crime fighter to the man who enjoys the close bond he has with his only child whom he has raised almost single-handedly. Foyle clearly loves spending time with his son and is proud of him, flawed though he is. Andrew is fortunate to have such a supportive and understanding father, who usually lets slide his son’s whims and lapses in judgement. It’s always a treat to watch the intimate scenes between father and son that are among the most moving and funny in the show.