A female Raptor came through an Anomaly to London some time around 1868. It established a nest in an old storage shack in a warehouse and went on a killing spree, killing Victorian Londoners and became known as "Spring-Heeled Jack" though nobody knew that it was a dinosaur not a person. (Episode 5.2, 5.3)
The Raptor later came through another Anomaly into an Art museum in present day London. The Anomaly Research Centre team arrived and were attacked by the Raptor, until Captain Becker tricked the creature into jumping back through the Anomaly while it was attempting to kill him.
In the Victorian, Matt Anderson found the Raptor in the warehouse, but it fled the scene when Emily Merchant arrived. A short time later, the Raptor attacked Henry Merchant's stagecoach in the street, scaring the horse off and killing the driver. The Raptor then returned to its nest in the warehouse, followed by Matt and Emily. Matt distracted it with a whip until Emily knocked it out with Matt's EMD.
Matt and Emily then dragged the unconscious Raptor back to the Anomaly, and threw it down a stairway through the Anomaly and back into the art museum in the present. When Henry Merchant came through the Anomaly and set off the art museum's motion detectors, the noise woke the Raptor up. It attacked and killed Henry before Becker either killed it or knocked it back out with an EMD. It is unknown what happened to the Raptor afterwards, but if it survived, then it was presumably placed in the ARC's Menagerie.
In the timeline which existed before Matt Anderson's intervention in 1868, by the time Emily was committed to Bedlam Asylum, the Raptor had caused twelve deaths. (Episode 5.2) This was presumably negated from the timeline after Matt went back to 1868 and he and Emily captured the Raptor and brought it to the present. (Episode 5.3)
Real World Mythology
Spring-heeled Jack is an entity in English folklore of the Victorian era. The first claimed sighting of Spring-heeled Jack was in 1837. Later sightings were reported all over Great Britain and were especially prevalent in suburban London, the Midlands and Scotland.
Spring-heeled Jack was described by people who claimed to have seen him as having a terrifying and frightful appearance, with diabolical physiognomy, clawed hands, and eyes that "resembled red balls of fire". One report claimed that, beneath a black cloak, he wore a helmet and a tight-fitting white garment like an oilskin.
- The Raptor could also have been the inspiration for the other infamous Victorian London Mass Murderer "Jack The Ripper".