Question: The season of what follows the adventures of Finn, a human boy, and his best friend and adoptive brother Jake, the season also includes guest stars Miguel Ferrer as Death; Ferrer would later reprise his role in the fourth season episode "Sons of Mars"?

Context articles: Adventure Time (season 6)
Web Weirdos
Elements (miniseries)
Islands (miniseries)
Adventure Time (season 4)
Adventure Time (season 2)
Death in Bloom
List of Adventure Time episodes
Adventure Time (season 8)
Adventure Time (season 5)

The sixth season of "Adventure Time", an American animated television series created by Pendleton Ward, premiered on Cartoon Network on April 21, 2014 and concluded on June 5, 2015.
 The season was produced by Cartoon Network Studios and Frederator Studios.
 The season follows the adventures of Finn, a human boy, and his best friend and adoptive brother Jake, a dog with magical powers to change shape and size at will.
 Finn and Jake live in the post-apocalyptic Land of Ooo, where they interact with the other main characters of the show: Princess Bubblegum, The Ice King, Marceline the Vampire Queen, Lumpy Space Princess, BMO, and Flame Princess.
"Web Weirdos" is the third episode of the fourth season of the American animated television series "Adventure Time".
 The episode was written and storyboarded by Ako Castuera and Jesse Moynihan, from a story by Patrick McHale, Kent Osborne, and Pendleton Ward.
 It originally aired on Cartoon Network on April 16, 2012.
 The episode guest stars both Bobcat Goldthwait and Susie Essman.
 The series follows the adventures of Finn (voiced by Jeremy Shada), a human boy, and his best friend and adoptive brother Jake (voiced by John DiMaggio), a dog with magical powers to change shape and grow and shrink at will.
 In this episode, Finn must help a grumpy spider couple, whose names are Barb and Ed, reconcile before he and Jake are eaten.
Elements is an American animated miniseries based on the show "Adventure Time" by Pendleton Ward.
 It aired as part of the show's ninth season on Cartoon Network from April 24 to April 27, 2017.
 "Adventure Time" follows the adventures of Finn (voiced by Jeremy Shada), a human boy, and his best friend and adoptive brother Jake (voiced by John DiMaggio), a dog with magical powers to change shape, grow and shrink at will.
 In this limited event series, which itself follows the events of the "Islands" miniseries, Finn, Jake, and BMO return home to discover that Ooo has been turned into a veritable dystopia thanks to extreme elemental magic.
 Finn and Jake team up with Ice King (voiced by Tom Kenny), Betty (voiced by Felicia Day), and Lumpy Space Princess (voiced by Ward) to set things straight.
Islands is an American animated miniseries based on the show "Adventure Time" by Pendleton Ward.
 It aired as part of the show's eighth season on Cartoon Network from January 30, 2017, to February 2, 2017.
 "Adventure Time" follows the adventures of Finn (voiced by Jeremy Shada), a human boy, and his best friend and adoptive brother Jake (voiced by John DiMaggio), a dog with magical powers to change shape, grow and shrink at will.
 In this limited event series, Finn, Jake, BMO (voiced by Niki Yang) and Susan Strong (voiced by Jackie Buscarino) leave Ooo and travel across the ocean to solve the mystery of Finn's past.
 During their trip, they encounter various creatures, new friends, and a variety of mysterious islands.
 The trip culminates with a visit to Founder's Island, where Finn meets his biological mother, Minerva Campbell (voiced by Sharon Horgan), and discovers what happened to the remainder of the human race.
The fourth season of "Adventure Time", an American animated television series created by Pendleton Ward, premiered on Cartoon Network on April 2, 2012 and concluded on October 22, 2012.
 The season was produced by Cartoon Network Studios and Frederator Studios.
 The season follows the adventures of Finn, a human boy, and his best friend and adoptive brother Jake, a dog with magical powers to change shape and size at will.
 Finn and Jake live in the post-apocalyptic Land of Ooo, where they interact with the other main characters of the show: Princess Bubblegum, The Ice King, Marceline the Vampire Queen, Lumpy Space Princess, BMO, and Flame Princess.
The second season of "Adventure Time", an American animated television series created by Pendleton Ward, premiered on Cartoon Network on October 11, 2010 and concluded on May 2, 2011.
 The season was produced by Cartoon Network Studios and Frederator Studios.
 The season follows the adventures of Finn, a human boy, and his best friend and adoptive brother Jake, a dog with magical powers to change shape and size at will.
 Finn and Jake live in the post-apocalyptic Land of Ooo, where they interact with the other main characters of the show: Princess Bubblegum, The Ice King, Marceline the Vampire Queen, Lumpy Space Princess, and BMO.
"Death in Bloom" is the seventeenth episode of the second season of the American animated television series "Adventure Time".
 The episode was written and storyboarded by Jesse Moynihan and Cole Sanchez, from a story by Mark Banker, Kent Osborne, Patrick McHale, and series creator Pendleton Ward.
 It originally aired on Cartoon Network on February 28, 2011.
 The episode guest stars Miguel Ferrer as Death; Ferrer would later reprise his role in the fourth season episode "Sons of Mars".
"Adventure Time" is an American animated television series created by Pendleton Ward for Cartoon Network.
 The series follows the adventures of Finn (voiced by Jeremy Shada), a human boy, and his best friend and adoptive brother Jake (voiced by John DiMaggio), a dog with magical powers to change shape and grow and shrink at will.
 Finn and Jake live in the post-apocalyptic Land of Ooo.
 Throughout the series, they interact with the show's other main characters: Princess Bubblegum (voiced by Hynden Walch), the sovereign of the Candy Kingdom; the Ice King (voiced by Tom Kenny), a demented but largely misunderstood ice wizard; Marceline the Vampire Queen (voiced by Olivia Olson), a thousand-year-old vampire and rock music enthusiast; Lumpy Space Princess (voiced by Ward), a melodramatic and immature princess made out of "irradiated stardust"; BMO (voiced by Niki Yang), a sentient video game console-shaped robot that lives with Finn and Jake; and Flame Princess (voiced by Jessica DiCicco), a flame elemental and ruler of the Fire Kingdom.
 The pilot first aired in 2007, and it was later re-aired on the incubator series "Random!
 Cartoons" on Nicktoons Network.
 The pilot eventually leaked onto the internet and became a cult hit on YouTube.
 After Nickelodeon declined to turn the short into a full-fledged show, Cartoon Network purchased the rights, and "Adventure Time" launched as a series on April 5, 2010.
The eighth season of "Adventure Time", an American animated television series created by Pendleton Ward, premiered on Cartoon Network on March 26, 2016 and concluded on February 2, 2017.
 The season was produced by Cartoon Network Studios and Frederator Studios.
 The season follows the adventures of Finn, a human boy, and his best friend and adoptive brother Jake, a dog with magical powers to change shape and size at will.
 Finn and Jake live in the post-apocalyptic Land of Ooo, where they interact with the other main characters of the show: Princess Bubblegum, The Ice King, Marceline the Vampire Queen, Lumpy Space Princess, BMO, and Flame Princess.
The fifth season of "Adventure Time", an American animated television series created by Pendleton Ward, premiered on Cartoon Network on November 12, 2012 and concluded on March 17, 2014.
 The season was produced by Cartoon Network Studios and Frederator Studios.
 The season follows the adventures of Finn, a human boy, and his best friend and adoptive brother Jake, a dog with magical powers to change shape and size at will.
 Finn and Jake live in the post-apocalyptic Land of Ooo, where they interact with the other main characters of the show: Princess Bubblegum, The Ice King, Marceline the Vampire Queen, Lumpy Space Princess, BMO, and Flame Princess.