<Tr> <Td_colspan="7"> Zordon's protege Gosei calls on high school students Troy Burrows, Noah Carver, Jake Holling, Emma Goodall, and Gia Moran to become the Megaforce Power Rangers to battle the invasion of the Warstar Empire . They are later joined by the Robo Knight in his fight against the Toxic Mutants . </Td> </Tr> <Tr> <Th> 21 </Th> <Td> "Power Rangers Super Megaforce" </Td> <Td> Kaizoku Sentai Gokaiger </Td> <Td> Nickelodeon </Td> <Td> February 15, 2014 (2014 - 02 - 15) </Td> <Td> November 22, 2014 </Td> <Td> 20 </Td> </Tr> <Tr> <Td_colspan="7"> With the Warstar Empire's forces increasing their invasion, Gosei gives the Rangers new morphers to assume Super Mega Mode, allowing them to call on the powers of all of the previous Power Rangers . They are joined by Orion, a citizen from the planet Andresia . </Td> </Tr> <Tr> <Th> 22 23 </Th> <Td> "Power Rangers Dino Charge" "Power Rangers Super Dino Charge" </Td> <Td> Zyuden Sentai Kyoryuger </Td> <Td> Nickelodeon </Td> <Td> February 7, 2015 (2015 - 02 - 07) January 30, 2016 </Td> <Td> December 12, 2015 December 10, 2016 </Td> <Td> 22 22 </Td> </Tr>

What order is the power ranger series in