Question: The End of Time is a two-part story and the last story for which lead actor?
Context: David Tennant (born David John McDonald; 18 April 1971) is a Scottish actor and voice actor.  He is best known for his roles as the Tenth Doctor in the British television series "Doctor Who", Alec Hardy in "Broadchurch", Giacomo Casanova in the TV serial "Casanova", Kilgrave in "Jessica Jones", and Barty Crouch, Jr.  in the film "Harry Potter and the Goblet of Fire".  In addition to his appearances on screen, he has worked as a voice actor and in theatre, including Prince Hamlet in a critically acclaimed 2008 stage production of "Hamlet" and as the voice of Scrooge McDuck in the new "DuckTales" series starting in 2017.  In January 2015, Tennant received the National Television Award for Special Recognition. "The Parting of the Ways" is the thirteenth episode of the revived first series of the British science fiction television programme "Doctor Who", which was first broadcast on 18 June 2005.  It was the second episode of the two-part story that featured Christopher Eccleston making his last appearance as the Ninth Doctor and marks the first appearance of David Tennant as the Tenth Doctor.  This is also the last episode to feature Jack Harkness as a regular companion on "Doctor Who".  Jack would appear as a guest companion in the Series 3 finale "Utopia", "The Sound of Drums" and "Last of the Time Lords" and again in the Series 4 finale "The Stolen Earth" / "Journey's End".  The first part, "Bad Wolf", was broadcast on 11 June. The End of Time is a two-part story from the British science fiction television programme "Doctor Who".  It was originally broadcast on BBC One in the United Kingdom on 25 December 2009 and 1 January 2010, and is the fifth "Doctor Who" Christmas special.  This is the last story for lead actor David Tennant, who hands over the role of alien time traveller the Doctor to Matt Smith.  It is also the last "Doctor Who" story written and produced by Russell T Davies, who shepherded the series' return to British television in 2005 and served as the series' executive producer and chief writer.  Davies was succeeded as executive producer and showrunner by Steven Moffat. The Last Sontaran is the first story of Series 2 of "The Sarah Jane Adventures" and is a continuation of events from "Doctor Who" two-part story "The Sontaran Strategem" and "The Poison Sky" .  The two-part story, "The Last Sontaran", was broadcast on 29 September 2008; "Part One" as part of the CBBC slot on BBC One at 4.35 p.m.; "Part Two" on the CBBC Channel at 5.15 p.m..  This serial marks the departure of Maria Jackson . "Paradise Island Lost" is the name to two-part story arc written by Phil Jimenez who also did the artwork, featured in "Wonder Woman (Vol.  2)" #168-169.  This was Jimenez' second story arc under his run on Wonder Woman, with the first being the "Gods of Gotham" four-issue story arc from "Wonder Woman (Vol.  2)" #164-167.  Just like "Gods of Gotham" where he was a co-writer with J. M. DeMatteis, he co-wrote this story arc with George Pérez, best known to have rebooted Wonder Woman in 1987 first with the "Gods and Mortals" story arc, that marked his return to the book since 1992.  It wouldn't be until issue #171 where Jimenez became the book's sole writer.  The story's name is taken from an epic poem of the same name by John Milton. "Doomsday" is the thirteenth and final episode in the second series of the revival of the British science fiction television programme "Doctor Who".  It was first broadcast on 8 July 2006 and is the conclusion of a two-part story; the first part, "Army of Ghosts", was broadcast on 1 July 2006.  The two-part story features the Daleks, presumed extinct after the events of the 2005 series' finale, and the Cybermen, who appeared in a parallel universe in "Rise of the Cybermen" and "The Age of Steel".  Both species unexpectedly arrive on Earth at the conclusion of "Army of Ghosts". Death of the Doctor is a two-part story of "The Sarah Jane Adventures" which was broadcast on CBBC on 25 and 26 October 2010.  It is the third story of the fourth series.  A cross-over story with Doctor Who, this episode features actress Katy Manning reprising her role as Jo Grant and a guest appearance by Matt Smith as the Eleventh Doctor.  Exposition at the end of the episode provides updates on the lives of numerous companions from the "classic era" who had gone unaddressed in the revived era.  This story was the last to feature Sarah Jane Smith and the Doctor together onscreen. The Last Story (Japanese: ラストストーリー , Hepburn: Rasuto Sutōrī ) is a Japanese action role-playing game, developed by Mistwalker and AQ Interactive for the Wii video game console.  Nintendo published the title in all regions except for North America, where it was published by Xseed Games.  Initially released in Japan in 2011, the game was released in western territories through 2012.  "The Last Story" takes place upon the island fortress of Lazulis, in a world that is slowly being drained of life by an unknown force.  The story focuses on a group of mercenaries looking for work on Lazulis; one of their number, Zael, dreams of becoming a knight.  After receiving the mystical "Mark of the Outsider", Zael becomes involved with a noblewoman named Calista in an ongoing war between humans and the beast-like Gorak.  During gameplay, the player controls Zael as he and the mercenary group to which he belongs undertake missions on Lazulis.  Zael can command the rest of the mercenary squad during missions, and fights in battles that involve action, tactical and stealth elements.  Multiple online multiplayer modes are also present. The Thak man-eater was a female Bengal tiger who killed and ate four human victims (two women, two men) between September and November 1938.  She was operating in Kumaon, at the Nepalese border, between the villages Thak, Chuka, Kot Kindri and Sem.  The tigress was shot at about 6:00pm on 30 November 1938 by Jim Corbett.  This was the last man-eater killed by Corbett.  The story about Thak man-eater is known as one of the most dramatic stories about man-eating animals.  It was the last story in the USA edition of the bestselling book "Man-Eaters of Kumaon" (published by Oxford University press in 1944).  In the UK edition the last story of the book was "Just Tigers".  The book "Man-Eaters of Kumaon" became the book of the year in USA in 1945, and a Hollywood film "Man-Eater of Kumaon" was made in 1948. "The Time of Angels" is the fourth episode in the fifth series of British science fiction television series "Doctor Who", first broadcast on 24 April 2010 on BBC One.  It is the first episode of a two-part story written by showrunner Steven Moffat and directed by Adam Smith; the second episode was "Flesh and Stone".  Moffat utilised the two-part episode to bring back a couple of his previous creations: the Weeping Angels from his series three episode "Blink", and River Song (Alex Kingston) from the series four episodes "Silence in the Library" and "Forest of the Dead".  The episode is partly set in the 51st century.
Answer: David Tennant