Howard is a real person portrayed by Walter Huston in the TV series American Experience (based on a true story).
In the first episode they appeared in, titled Dinosaur Wars (season 23), they were 127 years old.
They appear in 1 episodes out of a total of 387 aired so far
Episodes1
Dinosaur Wars
episode S23.E5 january 2011From PBS and American Experience - In the summer of 1868, paleontologist Othniel Charles Marsh boarded a Union Pacific train for a sightseeing excursion through the heart of the newly opened American West. While most passengers simply saw magnificent landscapes, Marsh soon realized he was traveling through the greatest dinosaur burial ground of all time.