Question: Battle of the Giants!  is the first special Christmas episode of a comedy series written by what two people?

Context paragraphs:
Dad's Army: Dad's Army is a BBC television sitcom about the British Home Guard during the Second World War.  It was written by Jimmy Perry and David Croft, and broadcast on the BBC from 1968 to 1977.  The sitcom ran for nine series and 80 episodes in total; there was also a radio version based on the television scripts, a feature film and a stage show.  The series regularly gained audiences of 18 million viewers, and is still repeated worldwide.

Jambo Bolton: James "Jambo" Bolton is a fictional character from the British Channel 4 soap opera, "Hollyoaks", played by Will Mellor.  He first appeared as an original character in 1995, before leaving in 1998.  In 2004, Mellor reprised his role briefly for a special Christmas episode.

Battle of the Giants!: Battle of the Giants!  is the first special Christmas episode of the British comedy series "Dad's Army" that was originally transmitted on Monday 27 December 1971.

Portlandia (season 3): The third season of the television comedy "Portlandia" began airing on IFC in the United States on December 14, 2012, consisting a total of 11 episodes.  Season three kicked off with a special Christmas episode.  The series stars Fred Armisen and Carrie Brownstein.

A Very Special Christmas (album): A Very Special Christmas is the first in the "A Very Special Christmas" series of Christmas-themed compilation albums produced to benefit Special Olympics.  The album was released in mid-October 1987, and production was overseen by Jimmy Iovine for A&M Records.  "A Very Special Christmas" has also raised millions of dollars for the Special Olympics.  The cover artwork was designed by Keith Haring.

Christmas in Hollis: "Christmas in Hollis" is a single by Run–D.M.C. that was included on two 1987 Christmas compilation albums featuring various artists: "A Very Special Christmas" (A&M 3911) and "Christmas Rap" (Profile 1247).  A&M Records originally released the song as a single in 1987 off of the "A Very Special Christmas" album.  The track was produced by the group along with Rick Rubin, and has become popular during the holiday season.  It reached number 78 on the "Billboard" Hot R&B/Hip-Hop Songs chart in 2000, 13 years after it was first released.  The title refers to Hollis, the neighborhood in Queens where the members of Run-D.M.C.  grew up.  When Bill Adler first asked Run-D.M.C.  to be involved with "A Very Special Christmas" they refused.  After Bill gave the band the idea for "Christmas in Hollis" they changed their minds and agreed to be on the album.

A Very Special Christmas 5: A Very Special Christmas 5 is the fifth in the "A Very Special Christmas" series of Christmas-themed compilation albums produced to benefit Special Olympics.  Several of the album's tracks were recorded live in Washington, D.C. in December 2000 at a benefit concert hosted by then-President Bill Clinton and First Lady Hillary Clinton.  The album was released on 30 October 2001, with production supervision by Bobby Shriver, Jon Bon Jovi, and Joel Gallen for A&M Records.

D.C. Follies: D.C. Follies is a syndicated sitcom which aired from 1987–1989 and was set in a Washington, D.C. bar, where bartender Fred Willard would welcome puppet caricatures of politicians and pop culture figures.  The show was satirical, and frequently commented on politicians and the political process.  Although Willard was the only live actor appearing regularly, each episode brought a celebrity guest into the bar, such as Martin Mull, Robin Leach, Bob Uecker, and Betty White.  In one episode, Robert Englund showed up as his Freddy Krueger character, and in a special Christmas episode an un-billed actor played Santa Claus.  Another episode had Mike Tyson confront his own puppet character.

A Very Special Christmas Live: A Very Special Christmas Live is the fourth in the "A Very Special Christmas" series of Christmas music-themed compilation albums produced to benefit Special Olympics.  The album was recorded live in Washington, D.C. in December 1998 at a benefit party held by then-President Bill Clinton and First Lady Hillary Clinton to celebrate the thirtieth anniversary of the founding of Special Olympics.  It was released on 19 October 1999, and production was overseen by Bobby Shriver for A&M Records.

White Christmas Blues: "White Christmas Blues" is the eighth episode of the 25th season of the American animated sitcom "The Simpsons", and the 538th episode of the series.  It originally aired on the Fox network in the United States on December 15, 2013.  The episode was written by Don Payne and directed by Steven Dean Moore.  It was the first Christmas episode since "Holidays of Future Passed" and the twelfth Christmas episode of the show.

Supporting paragraphs: Battle of the Giants! Dad's Army
Answer: Jimmy Perry and David Croft