Atti is een Romeinse tiener met veel verstand maar met weinig spieren. Als één van zijn plannen in strijd is met de visie van keizer Nero, wordt Atti naar het koude, natte Groot-Brittanië gestuurd aan de rand van het Romeinse Rijk. Hij wordt er gevangengenomen door Orla, een pittige Kelt, maar ze besluiten om toch op een akkoordje te gooien. Als Atti teruggestuurd wordt naar zijn regiment, merkt hij dat hij het opneemt tegen Orla en haar stam in de Slag bij Watling Street.
Nee, helaas is Horrible Histories: The Movie — Rotten Romans nog niet beschikbaar op Netflix in Nederland.
| Crew | Paul Howell | Stunts |
| Crew | David Newton | Stunts |
| Art | Colin Bayliss | Property Master |
| Art | Margaret Spohrer | Art Direction |
| Crew | Michael Byrch | Stunts |
| Crew | Dominic Preece | Stunt Coordinator |
| Crew | Adam Smith | Stunts |
| Production | Simon Williams | Executive Producer |
| Production | Melissa Hardinge | Executive Producer |
| Production | Claudia Bluemhuber | Executive Producer |
| Production | Joe Oppenheimer | Executive Producer |
| Production | Julian Bird | Executive Producer |
| Costume & Make-Up | Kate Benton | Makeup Designer |
| Production | Vaishali Mistry | Executive Producer |
| Production | Iole Lucchese | Executive Producer |
| Production | Geraldine Atlee | Executive Producer |
| Production | Rose Garnett | Executive Producer |
| Production | Florian Dargel | Executive Producer |
| Costume & Make-Up | Kate Benton | Hair Designer |
| Crew | Alistair Hopkins | Post Production Supervisor |
| Directing | Natalie Scicluna | Script Supervisor |
| Camera | Oliver Hadlow-Martin | Digital Imaging Technician |
| Directing | Matthew Gallagher | First Assistant Director |
| Production | Jackie Wetherill | Production Accountant |
| Production | Ashton Radcliffe | Location Manager |
| Art | Margaret Spohrer | Supervising Art Director |
| Sound | Matt Katz | Original Music Composer |
| Sound | Richie Webb | Original Music Composer |
| Sound | Iain Farrington | Original Music Composer |
| Camera | John Sorapure | Director of Photography |
| Editing | Nigel Williams | Editor |
| Art | Andy Grogan | Set Decoration |
| Costume & Make-Up | Ros Little | Costume Designer |
| Production | Richard Bradley | Executive Producer |
| Writing | Jessica Swale | Writer |
| Production | Nancy Bray | Line Producer |
| Art | Heather Burton | Production Design |
| Production | Giles Pilbrow | Co-Producer |
| Production | Joanna Osborn | Production Manager |
| Production | Caroline Norris | Producer |
| Directing | Dominic Brigstocke | Director |
| Production | Will Clarke | Producer |
| Production | Andy Mayson | Executive Producer |
| Production | Mike Runagall | Executive Producer |
| Production | Colin Jones | Casting |
| Production | Giles Pilbrow | Executive Producer |
| Production | Bradley Quirk | Executive Producer |
