Primeval
Episode 7
S3 E7:
An anomaly opens in the middle of a huge car parts yard and a dinosaur from the Cretaceous era comes through. The Dracorex is wounded, which only makes it more dangerous as it tries to protect itself. The team is trying to force it back when, suddenly, a medieval knight on horseback gallops through the anomaly, chasing what he thinks is a dragon.
Starring
Tony Curran, Patrick Romer, Jordan Long