Question: When was the show's pilot episode that John Bliss played Irving Pal in?

Context paragraphs:
The Scavengers (1969 film): The Scavengers (1969) is a western war drama and exploitation film released in 1969, and re-released as The Grabbers in 1970.  It was directed by Lee Frost and starred John Bliss.  Uschi Digard also participated.

Pilot (Glee): "Pilot" is the pilot episode of the American television series "Glee", which premiered on the Fox network on May 19, 2009.  An extended director's cut version aired on September 2, 2009.  The show focuses on a high school show choir, also known as a glee club, set within the fictional William McKinley High School in Lima, Ohio.  The pilot episode covers the formation of the club and introduces the main characters.  The episode was directed by series creator Ryan Murphy, and written by Murphy, Brad Falchuk and Ian Brennan.  Murphy selected the music featured in the episode, with the intention of maintaining a balance between showtunes and chart hits.

C. D. Bliss: Clifford Douglas "Pop" Bliss (July 16, 1870 – March 26, 1948) was an American football player and coach.  He served as the head football coach at Stanford University, Haverford College, and the University of Missouri, compiling a career college football record of 15–6–1.  Bliss played football at Yale University as a halfback alongside his brother, Laurie Bliss, who went on to coach at the United States Military Academy and Lehigh University.

Elmer Bliss: Elmer Ward Bliss (March 9, 1875 – March 18, 1962) was a Major League Baseball pitcher and outfielder.  Bliss played for the New York Highlanders in 1903 and 1904 .  In 1903, Bliss, as a pitcher, played in 1 game and got the win, going 7 innings with one run allowed.  Then in 1904, Bliss appeared in a game for the Highlanders as an outfielder.  He went 0-1 in the game.  He batted left and threw left-handed.

Ned's Declassified School Survival Guide: Ned's Declassified School Survival Guide (sometimes shortened to "Ned's Declassified") is an American live action sitcom on Nickelodeon that debuted in the Nickelodeon Sunday night TEENick scheduling block on September 12, 2004.  The series' original pilot episode aired on September 7, 2003, without many of the current version's main characters, and it was ordered to series by Nickelodeon in early 2004.  The one-hour special movie series finale aired on June 8, 2007.

John Bliss House: The John Bliss House is an historic stone ender house on 2 Wilbur Avenue near Bliss Road in Newport, Rhode Island.  The late seventeenth century Jacobean house is one of the oldest surviving buildings in Rhode Island.

Television pilot: A television pilot (also known as a pilot or a pilot episode and sometimes marketed as a tele-movie) is a standalone episode of a television series that is used to sell the show to a television network.  At the time of its creation, the pilot is meant to be the testing ground to gauge whether a series will be successful, and is therefore a test episode of an intended television series.  It is an early step in the development of a television series, much like pilot studies serve as precursors to the start of larger activity.  In the case of a successful television series, the pilot is commonly the very first episode that is aired of the particular series under its own name.  A "back door pilot", is an episode of an existing successful series, that features future tie-in characters of an up-and-coming television series or film.  The purpose of the "back door pilot" is to introduce the characters to an audience before the creators decide on whether they want to pursue a spin-off series with those characters or not.

Laurie Bliss: Laurence Thornton "Laurie" Bliss (November 28, 1872 – November 12, 1942) was an American football player and coach.  He served as the head football coach at the United States Military Academy in 1893 and at Lehigh University in 1895, compiling a career college football record of 7–11.  Bliss played football at Yale University as a halfback alongside his brother, C. D. "Pop" Bliss, who went on to coach at Stanford University, Haverford College, and the University of Missouri.  After graduation, he played with the amateur Chicago Athletic Association.

John Bliss: John Bliss (October 8, 1930 – February 28, 2008) was an American actor known for playing the role of the 8th grade Social Studies teacher and former Principal Irving Pal on "Ned's Declassified School Survival Guide".  He was also seen in the first episode of "Out of Jimmy's Head".  He fondly remembered George Clooney, and how George was so polite and called him "Mr. Bliss" and offered him food on the set of "Intolerable Cruelty", in which they both appeared.

CID (Indian TV series): CID is an Indian detective television anthology series about Maharashtra and Mumbai's Crime Investigation Department, created by B. P. Singh for Sony Entertainment Television India and Sony Entertainment Television Asia.  The series stars Shivaji Satam as ACP Pradyuman, Aditya Srivastav as Senior Inspector Abhijeet, Dayanand Shetty as Senior Inspector Daya, Dinesh Phadnis as Inspector Fredricks and Narendra Gupta as Dr. R. P. Salunkhe.  These 5 main characters of the show also share a long-lasting bond by working in the series for almost the same period since its inception on Sony Entertainment Television.  The location of the series is set in Mumbai, Maharashtra, India.  Following a pilot episode on 29 April 1997, the series premiered on 21 January 1998 and is the longest running television series in India, having completed 19 years in January 2017, entering the 20th year of its run.  The show airs on Saturday and Sunday nights at 10:00 pm IST.  The series aired its 1,000th episode on 27 September 2013.  The show also re-runs on Sony's sister channel Sony Pal every night at 9 PM IST, and in afternoon slots for classic episodes.

Supporting paragraphs: John Bliss Ned's Declassified School Survival Guide
Answer: September 7, 2003