The third season of The Deep premiered on ABC ME in Australia on March 3, 2019. On February 13, 2018 The Deep was renewed for season 3 after ABC ME (an Australian Broadcasting Company channel) ordered 13 episodes of Season 3. It consists of 13 half-hour episodes, totaling up to 52 episodes for the series. The Animated series was also released on Netflix on November 1, 2019. The first release of Season 3 came to television in March with ABC MC in Australia. The season premiered with the episode "The Treasure" and concluded with The Sceptre.
The Monumentals — huge creatures capable of changing the world — are waking from their long slumber! To put the giants back to sleep, Ant, Fontaine, Will and Kaiko must find the ancient city of Lemuria and harness its secret. Dangerous pirates, fantastic creatures and tantalizing mysteries will confront them along the way. But even with unexpected help from Jeffrey the Fish, they’re running out of time.
In an interview with Tom Taylor and Dave Richards of Comic Books Resources published in September 22, 2017, Taylor first hinted about a possibility of a 3rd season of the season, suggesting that another season is "highly likely".
On January 21, 2018, Tom Taylor hinted on Twitter that there will be news about a possible announcement of a 3rd season. The first news came on February 13, 2018 when DHX Media, A Stark Production, and Technicolor, announcing that Australia's ABC ME ordered an additional 13 half-hour episodes of The Deep animated series, giving Season 3 a green light; with Season 3 to premiere on Family CHRGD in Canada and with a Global release on Netflix.
At Toy fair 2018 Steven Wendland from Technicolor announced a new line of toys for the show which includes action figures of the main characters, some of the creatures, stuffed animals, and a few of the vehicles including the Rover, White Knight, and Mag Knight, as well as a new vehicle called the "Red Claw" which Wendland describes as the pirates version of the Rover and is said to appear in season 3. Additionally, Jess and Bob Gorman are to be in Friends In Deep Places.
For the first time in the series's history, The Deep will be globally released worldwide via Netflix (except for Canada where Season 3 will be released on DHX-owned Family CHRGD first before going to Netflix). A release date is expected to come in 2019. On December 14, 2018, additional deals with CBBC (UK), Super RTL (Germany), VRT (Belgium), NRK (Norway), KidsZone (Estonia, Latvia, and, Lithuania), S4C (UK and Wales), SVT (Sweden), and TVP (Poland) were made to air Season 3 on those Networks in addition to the Global release on Netflix. Season 3 is expected to be premiered in Australia first on March 3 on ABC ME followed by CBBC the following day on March 4. In Canada, Family CHRGD aired Season 3 on March 11. In the US and other countries, Season 3 premiered on Netflix on November 1, 2019.
|ABC ME||Australia||March 3, 2019||March 15, 2019|
|CBBC||Great Britain||March 4, 2019||TBA|
|Family CHRGD||Canada (English)||March 11, 2019||TBA|
|Netflix||United States and other countries||November 1, 2019||November 1, 2019|
|SVT||Sweden||June 10, 2019||July 22, 2019|
|Title||Original Airdate||Aired On|
|40||1||The Treasure||March 3rd, 2019||ABC ME|
|"The Dark Orca pirates unwittingly steal a treasure that can awaken a Monumential and possibly destroy them and the Nektons."|
|41||2||Off Line||March 4th, 2019||ABC ME|
|"The internet being down is the worst thing imaginable for Ant and Fontaine - until Ant finds the sea monster responsible! Can he save both?"|
|42||3||Friends In Deep Places||March 5th, 2019||ABC ME|
|"Trying to rescue Jess Gorman in an underwater cave proves dangerous for Ant and Fontaine until a Manatee comes to their aid."|
|43||4||Just Eaten||March 6th, 2019||ABC ME|
|"The Aronnax and Alpheus' sub are trapped within a giant Jellyfish Monumential. They've been eaten and the jellyfish won't let food out."|
|44||5||Family Ties||March 7th, 2019||ABC ME|
|"Devil Daniels insists he's relocating a dangerous killer whale. But it is a scam that turns dangerous - for Ant and the whale."|
|45||6||The Circle Game||March 8th, 2019||ABC ME|
|"The Nektons find an underwater crop circle. It's made by a giant male puffer fish to attract a mate. Can Ant help the romance along?"|
|46||7||The Unicorn||March 9th, 2019||ABC ME|
|"Ant tries to locate a "diamond-horned sea-unicorn" as a present for Fontaine's birthday. But Dolos and Devil Daniels are also hunting it."|
|47||8||Purple Tide||March 10th, 2019||ABC ME|
|"The Nektons try to save an island from "The Purple Tide" that legend says will destroy everything. To save it, they need to find "The Protector"."|
|48||9||The Race||March 11th, 2019||ABC ME|
|"Ant wants to go faster than the fastest fish in the sea - the sailfish. But he hasn't counted on a deadly oil spill."|
|49||10||Kidnapped||March 12th, 2019||ABC ME|
|"Jeffrey is kidnapped, in his "Jeffrey Knight", by Dark Orca pirates. Can Jeffrey turn the tables and save himself?"|
|50||11||More Thunder and Lightning||March 13th, 2019||ABC ME|
|"The Nektons return to the mysterious Lemurian Gates they found previously. Exploring within, they're stunned to discover Lemuria is here."|
|51||12||Lemuria||March 14th, 2019||ABC ME|
|"The Nektons explore Lemuria but Fontaine realises the others are being affected by a dangerous algae. Can she find an antidote and save them?|
|52||13||The Sceptre||March 15th, 2019||ABC ME|
|"The Nektons find the Queen's sceptre. But when faced with the Kraken and the Electric Ray Monumential together, Ant can't make it work."|
- Queen Dores' scepter will be found
- It is noted that in this season, Lemuria will be discovered by the Nektons!
- Jess and Bob are set to reappear in the episode "Friends in Deep Places" of this season
- The Red Claw will be introduced for the first time in "The Treasure"
- While Dolos is set to reappear in "The Unicorn"