Keith Branigan Kane-Summerfield

 was the son of Bernice Summerfield and Jason Kane in a possible timeline.

Biography
Before she gave birth to Keith, Bernice was given an eighteen-month-old Keith by the ghost. Bernice showed him to her father. He faded away once the ghost died. (PROSE: Return of the Living Dad)

Keith bled into existence at several points during Peter Summerfield's youth. Peter thought of him as his friend. The two of them played together in the Braxiatel Collection's museum, where they entered an ancient Martian spaceship. (PROSE: Key)

Bernice left Jason looking after Keith and his younger sister Rebecca Kane-Summerfield when she went looking for where the Doctor was buried. (PROSE: The Shape of the Hole)

He travelled back in to rescue his mother when he was 20. He saved her from being killed by Nimmari. He wanted to stop a war that started because of the artefact she had discovered. He was killed right in front of his mother's eyes. (PROSE: Might)

Bernice saw a timeline where Keith and Peter visited her when she was an old woman. (PROSE: Mother's Ruin)

Appearance
Keith had bright eyes. At the age of eighteen months, he wore a dark blue pair of overalls and a stripey T-shirt. (PROSE: Return of the Living Dad)