(As of March 2015) In the U.S.A. it airs...
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In the U.K., Family Guy will air exclusively on ITV2 when it returns in the fall.
Matt Stone & Trey Parker said they will continue the show until Comedy Central decides to end it so if they continue to feel that way there's no telling when it will end, however currently they are contracted through the show's 23rd Season 'ending' in 2019.
As of August 15th 2013, that information is unknown. It is still usually the most watched show on Nickelodeon so it's reasonable to presume Nick will not want to end it anytime soon.
Of course the 'most watched' title helps when it airs 8 to 10 times a day, everyday.
On January 12th 2018, TBS announced they had renewed American Dad for 2 additional seasons (Seasons Fifteen & Sixteen - 22 episode each) taking the show through 2020.
If it doesn't get renewed again it'll end then.
How?
What are you asking... how does a specific episode end, Which episode?
How does the series end? The series hasn't been cancelled so there is no 'end' yet.
Family Guy will end when the last episode airs.
Season 15 ended in May 2017.
Season 16 began in September 2017.
If it doesn't return for a 17th Season, it will end in May 2018.
Without knowing which specific season finale you're asking about, your question cannot be answered however, with the exceptions of Seasons Two & Three, the finales air in May.
He was a security guard that worked at the studio where American Dad was created.
Goodbye, have a beautiful time! *thumbs up*
He's just that, a security guard at the studio American Dad is created. However, in a recent episode commentary it was said he no longer works at the studio.
'Jewel' is not a character on American Dad
Its "Cool Change" by Little River Band.
He was a security guard at the studio where American Dad is made.
He was a security guard that worked at the studio where American Dad was created.
Goodbye, have a beautiful time! *thumbs up*
He's just that, a security guard at the studio American Dad is created. However, in a recent episode commentary it was said he no longer works at the studio.
See Provided Link
'Jessica' is not a character on American Dad
'Jewel' is not a character on American Dad
Stan Smith
INXS - Never Tear Us Apart
See Provided Link
Cilantro by Dan narravo
American Dad - 2005 The American Dad After School Special 2-2 was released on: USA: 17 September 2006 Hungary: 9 April 2009