Series 9 of Robot Wars aired in early 2017, returning to the Glasgow arena used in the previous series. The series was again hosted by Dara Ó Briain and Angela Scanlon, with commentary from Jonathan Pearce, also featuring the same Judges and House Robots as Series 8.
Episode 1 aired on Sunday 5th March, 2017 at 7pm. It continued for the four following Sundays, missed one week due to a clash with coverage of the final day of the 2017 Augusta Masters, one of Golf's Major Tournaments, on BBC Two, before airing the Grand Final on April 16th.
The series was first confirmed through online articles released in the early hours of October 11, 2016.
Applications for competing teams closed on October 21st. The series was filmed in one block in December 2016, from the 2nd to the 7th. The filming block included 2016's Christmas Special, Robot Wars: Battle of the Stars, and the main series, airing at a later date.
As they were not announced in any press packs, as was the case with Dara Ó Briain and Angela Scanlon, Judges Professor Noel Sharkey and Dr Lucy Rogers confirmed their involvement via Twitter, Noel Sharkey also confirming Sethu Vijayakumar's involvement. The return of Jonathan Pearce was confirmed by the UK Robot Wars Facebook account.
The first teaser trailer for the series aired on February 10th, 2017, officially referring to the series as Series 9 for the first time, and confirming that the series would air soon. Two alternate versions of the trailer exist with different background music- the first version uses "I Knew You Were Trouble" by Taylor Swift, whilst the second uses "The River (Dubstep Remix)" by Blues Saraceno.
The airdate of the series was first revealed on February 16th by the BBC, also confirming the eight competitors in Episode 1. On February 18th, an extended trailer aired after Match of the Day, where Sir Killalot, Shunt & Matilda destroyed a Vauxhall Corsa.
On February 22nd, competing teams were given permission to confirm their participation in the series, and release official imagery. Draven was the first robot to be revealed this way, followed by Eruption.
From April 5th-8th, How to Build a Robot was released online, featuring robots from Series 9 while promoting applications for future series. The main series finished airing on April 16th.
The format was the same as that of Series 8, the first time a series had followed the exact same format as a previous series, containing six episodes; five qualifying heats and a Grand Final, with a sixth finalist being chosen as a wildcard by the Judges. There were eight robots per heat, of the forty in total.
Four robots fought in each first-round qualifier, of which there are two per heat, allowing two robots to qualify through them. In the second round, a round robin format was used, where the four robots which qualified out of the first round in each episode would all face each other in a head-to-head battle, even if they had already met in the first round. A certain number of points was given to a robot, based on whether it lost (0 points), won via KO (3 points), or won via Judges' decision (2 points). The two robots with the most points fought again in the Heat Final.
- Main article: Robot Wars: Series 9/Heat 1
- Jellyfish vs Nuts 2 vs Rapid vs Terrorhurtz: Rapid and Terrorhurtz qualified
- Aftershock vs Crank-E vs Sabretooth vs TMHWK: Aftershock and Sabretooth qualified
- Sabretooth vs Terrorhurtz: Sabretooth won by KO
- Aftershock vs Rapid: Aftershock won by KO (After this battle, Rapid withdrew and was replaced by Jellyfish)
- Aftershock vs Sabretooth: Aftershock won by KO
- Terrorhurtz vs Jellyfish: Terrorhurtz won by KO
- Aftershock vs Terrorhurtz: Aftershock won by KO
- Jellyfish vs Sabretooth: Jellyfish won by Judges' decision
- Aftershock vs Sabretooth: Aftershock won
- Main article: Robot Wars: Series 9/Heat 2
- Behemoth vs Cobra vs Eruption vs Hobgoblin: Behemoth and Eruption qualified
- Cherub vs Draven vs PP3D vs Push to Exit: Cherub and PP3D qualified
- Behemoth vs Eruption: Eruption won by KO
- Cherub vs PP3D: Cherub won by Judges' decision
- Cherub vs Eruption: Eruption won by KO
- Behemoth vs PP3D: Behemoth won by KO
- Eruption vs PP3D: Eruption won by KO
- Behemoth vs Cherub: Cherub won by Judges' decision
- Eruption vs Cherub: Eruption won
- Main article: Robot Wars: Series 9/Heat 3
- Thor vs Chimera2 vs Concussion vs Tauron: Thor and Concussion qualified
- Expulsion vs M.R. Speed Squared vs Foxic vs Heavy Metal: M.R. Speed Squared and Heavy Metal qualified
- Concussion vs Thor: Concussion won by KO
- Heavy Metal vs M.R. Speed Squared: Heavy Metal won by KO
- Concussion vs Heavy Metal: Concussion won by KO
- M.R. Speed Squared vs Thor: Thor won by KO
- Concussion vs M.R. Speed Squared: Concussion won by Judges' decision
- Heavy Metal vs Thor: Thor won by KO
- Concussion vs Thor: Concussion won
- Main article: Robot Wars: Series 9/Heat 4
- Frostbite vs HIGH-5 vs Supernova vs Wyrm: Frostbite and Supernova qualified
- Apex vs Crushtacean vs Ironside3 vs Pulsar: Ironside3 and Pulsar qualified
- Frostbite vs Supernova: Supernova won by KO (After this battle, Frostbite withdrew and was replaced by Wyrm)
- Ironside3 vs Pulsar: No winner declared (2 points were awarded to each robot)
- Pulsar vs Supernova: Pulsar won by KO
- Ironside3 vs Wyrm: Ironside3 won by KO
- Pulsar vs Wyrm: Pulsar won by KO
- Ironside3 vs Supernova: Ironside3 won by KO
- Ironside3 vs Pulsar: Ironside3 won
- Main article: Robot Wars: Series 9/Heat 5
- Apollo vs Coyote vs Ms Nightshade vs Rusty: Apollo and Coyote qualified
- Carbide vs Crackers 'n' Smash vs Meggamouse vs Trolley Rage: Carbide and Crackers 'n' Smash qualified
- Apollo vs Carbide: Carbide won by KO
- Crackers 'n' Smash vs Coyote: Crackers 'n' Smash won by KO
- Apollo vs Coyote: Apollo won by KO
- Carbide vs Crackers 'n' Smash: Carbide won by mid-match forfeit
- Carbide vs Coyote: Carbide won by KO
- Apollo vs Crackers 'n' Smash: Apollo won by Judges' decision
- Apollo vs Carbide: Carbide won
- Main article: Robot Wars: Series 9/Grand Final
Wild Card: Apollo
- Aftershock vs Apollo vs Eruption: Aftershock and Eruption qualified
- Carbide vs Concussion vs Ironside3: Carbide and Ironside3 qualified
- Eruption vs Ironside3: Eruption won by KO
- Aftershock vs Carbide: Carbide won by KO
- Carbide vs Eruption: Carbide won by KO
- Aftershock vs Ironside3: Ironside3 won by KO
- Carbide vs Ironside3: Carbide won by KO
- Aftershock vs Eruption: Eruption won by KO
- Carbide vs Eruption: Carbide won
- Main article: Robot Wars: Series 9/Whiteboard matches
During the filming of the main series, a number of non-championship battles took place to entertain the audience during filming. These "whiteboard matches" were largely untelevised, with clips sometimes being used in the opening sequence of the show.
- Behemoth vs Gabriel: No winner declared
- Behemoth vs TR2 (Angela Scanlon vs Dara Ó Briain): No winner declared
- Behemoth vs TR2: TR2 won
Robot Wars: Battle of the Stars
- Main article: Robot Wars: Battle of the Stars
Although not officially part of any series, Robot Wars: Battle of the Stars, a two-part celebrity special, was filmed alongside Series 9, and aired on December 28-29th.
- Main article: Robot Wars: Battle of the Stars/Episode 1
- Main article: Robot Wars: Battle of the Stars/Episode 2
- No competing teams in Series 9 made their UK championship debut in Series 3.
- The Wilhelm Scream stock sound effect is heard during the introduction sequence.
- Series 9 became the second series, after Series 4, to feature a Grand Final where the runner-up of the previous series qualified.
- The Grand Final battle in Series 9 was the first not to go to a judges' decision since Series 3.
- The series was released on DVD as part of Robot Wars - The Complete Compendium 2017.
- Series 9 Teaser Trailer
- Alternate version of the Series 9 teaser
- Robot Wars Official website
- UK Robot Wars Facebook page
- UK Robot Wars Twitter
- Robot Wars YouTube channel