In the comics, Cable is Nathan Summers, the son of Cyclops and Madelyne Pryor, who was sent to the future, but returned to the present as an adult.
Nowadays, David Harbour is best known for his leading role as Chief Jim Hopper in Netflix’s Stranger Things, a character he’ll reprise later this year in the show’s second season.
On the movie side of things, his notable credits include Quantum of Solace, End of Watch, The Equalizer and Black Mass, while on television, he had recurring roles on Pan Am, The Newsroom and State of Affairs.
Cable is an older mutant, so Harbour is about the right age to faithfully play him, and since the man is already pretty tall, with a little extra time in the gym, he’d surely achieve the proper larger build.