Title: Vikings (season 5)
Content:  The fifth season of the historical drama television series Vikings premiered on November 29, 2017 on History in Canada. The series broadly follows the exploits of the legendary Viking chieftain Ragnar Lothbrok and his crew, and later those of his sons. The first season of the series begins at the start of the Viking Age, marked by the Lindisfarne raid in 793. The fifth season consists of a double order of twenty episodes, split into two parts of ten episodes; the first part concluded on January 24, 2018. The second half premiered on November 28, 2018. The premise of the fifth season differs from the previous four after the departure of Travis Fimmel as Ragnar, and it follows the adventures of his living sons. Jonathan Rhys Meyers is introduced as a main character, after his initial appearance in the fourth season's finale. The season concluded in its entirety on January 30, 2019.
Title: Vikings (season 5)
Content: Notes 
Title: Vikings (2013 TV series)
Content:  Vikings premiered on March 3, 2013, in Canada and the United States. Vikings was renewed for a fourth season in March 2015 with an extended order of 20 episodes, which premiered on February 18, 2016. On March 17, 2016, History renewed Vikings for a fifth season of 20 episodes, which premiered on November 29, 2017. On September 12, 2017, ahead of its fifth-season premiere, the series was renewed for a sixth season of 20 episodes. On January 4, 2019, it was announced that the sixth season would be the series' last. The sixth season premiered on December 4, 2019. The second part of the sixth and final season was released in its entirety on December 30, 2020 on Amazon 
Title: Vikings (season 5)
Content: India Mullen as Aethegyth, a noblewoman of Wessex ; Frank Prendergast as Bishop Cynebert of York ; Laurence O'Fuarain as Hakon, a whale hunter of Vestfold ; Bosco Hogan as Lord Abbot of Lindisfarne ; Mabel Hurley as young Lagertha, appearing in a flashback ; Ross Matthew Anderson as Lagertha's father, appearing in a flashback ; Ben McKeown as Crowbone, a Viking warrior at York ; Conn Rogers as Canute, a member of King Olaf's court ; Jamie Maclachlan as Aldwin, a Saxon commander ; Martin Maloney as Vigrid, one of Ivar's men 
Title: Vikings (season 5)
Content:  Eyvind (/eɪvɪnd/), a Viking of Kattegat who also joins Floki's expedition ; Leah McNamara as Aud the Deep-Minded (/eɪθ/), Kjetill Flatnose and Ingvild's daughter ; Jack McEvoy as Helgi the Lean, Eyvind and Rafarta's son, who is married to Thorunn ; Mei Bignall as Thorunn, Kjetill Flatnose and Ingvild's daughter and Helgi's wife ; Kelly Campbell as Ingvild, Kjetill Flatnose's wife ; James Craze as Bul, Eyvind and Rafarta's son ; Elijah Rowen as Asbjorn, Eyvind and Rafarta's son ; Donna Dent as Rafarta, Eyvind's wife ; Rob Malone as Thorgrim, Kjetill Flatnose and Ingvild's son ; Scott Graham as Frodi, Kjetill 
Title: Vikings (season 2)
Content:  The second season of the historical drama television series Vikings premiered on February 27, 2014 on History in Canada, and concluded on May 1, 2014, consisting of ten episodes. The series broadly follows the exploits of the legendary Viking chieftain Ragnar Lothbrok and his crew, and later those of his sons. The first season of the series begins at the start of the Viking Age, marked by the Lindisfarne raid in 793. The second season follows Ragnar's struggles with rival Vikings and his rise from Earl to King. The Vikings raid farther into England, and for the first time are offered land for settlement.
Title: Vikings (season 5)
Content:  Kjetill Flatnose, a violent and bold warrior. He is chosen by Floki to join an expedition to set up a colony in a new land. Irish actor Darren Cahill plays the role of Aethelred in the fifth season. Nigerian actor Stanley Amuzie told local media he had landed a small role in the fifth season. The fifth season also includes Irish actor, musician and real-life police detective, Kieran O'Reilly, who plays the role of White Hair. In April 2017 it was announced that Danish actor Erik Madsen had joined the cast for the fifth season, as King Hemming. He spent several months of 2016 on the set of The Last Kingdom, portraying a Viking.
Title: Vikings (season 6)
Content:  The sixth and final season of the historical drama television series Vikings premiered on December 4, 2019, on History in Canada. The series broadly follows the exploits of the legendary Viking chieftain Ragnar Lothbrok and his crew, and later those of his sons. The first season of the series begins at the start of the Viking Age, marked by the Lindisfarne raid in 793 AD. The sixth season consists of a double order of twenty episodes, split into two parts of ten episodes; the second half was released in its entirety on December 30, 2020 on Amazon Prime Video in Ireland, the United States, the United Kingdom, Germany, and Austria, ahead of its broadcast on History in Canada from January 1 to March 3, 2021. The season focuses on King Bjorn's reign over Kattegat, Ivar's adventures in Rus' and Wessex, and Ubbe's expeditions to Iceland and North America (Greenland and Canada).
Title: Vikings (season 2)
Content:  The second season of Vikings received positive reviews. On review aggregator website Rotten Tomatoes, the second season has a 92% approval rating with an average rating of 8.2/10 based on 13 reviews. The site's consensus reads, "Vikings makes up for its slow pace with captivating characters and visual appeal". Metacritic which uses a weighted average, assigned a score of 77 out of 100 based on 11 reviews, indicating "generally favorable reviews".
Title: Vikings (2013 TV series)
Content:  Video in Ireland, the United States, the United Kingdom, Germany, and Austria; and aired in Canada on History from January 1, 2021. In the UK, Vikings premiered on May 24, 2013, where it was exclusively available on the streaming video-on-demand service LoveFilm. The second season premiered on March 24, 2015. The third season began airing on February 20, 2015, on Amazon Video. In Australia, the series premiered on August 8, 2013, on SBS One. It was later moved to FX, which debuted the second season on February 4, 2015. Season three of Vikings began broadcasting in Australia on SBS One on March 19, 2015. Season four of Vikings began broadcasting in Australia on SBS One on February 24, 2016.

Question: when is the second half of vikings season 5 coming out?
Answer: 2018.