View source for TNG:Condensed

=== Bonus ===
So here are some episodes which seem to be notably good and standalone, and so could be worth some followups without getting into the other arcs... 
;The Drumhead (4x21)
;Time's Arrow (5x26 and 6x01)
: Data, Guinan, timetravel

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* Another "Condensed" listing - this one touches on several of the arcs mine missed - Romulans and Barclay. https://ask.metafilter.com/118960/Introduce-me-to-Star-Trek#1705460

* A fan-created Trek-dedicated wiki is great for further research: http://memory-alpha.org/wiki/Star_Trek:_The_Next_Generation

* A Doctor Who equivalent: ... find the Beginner's Guide To Doctor Who by Kyle Anderson... 
** http://www.nerdist.com/2012/03/doctor-who-for-newbies-the-companions-part-one/
** http://www.nerdist.com/2012/04/doctor-who-for-newbies-the-companions-part-two/
** http://www.nerdist.com/2012/04/doctor-who-for-newbies-the-companions-part-three/
** http://www.nerdist.com/2012/04/doctor-who-for-newbies-the-companions-part-four/
** http://www.nerdist.com/2010/09/doctor-who-for-newbies-the-first-doctor/
** http://www.nerdist.com/2010/09/doctor-who-for-newbies-the-second-doctor/
** http://www.nerdist.com/2010/09/doctor-who-for-newbies-the-third-doctor/
** http://www.nerdist.com/2010/10/doctor-who-for-newbies-the-fourth-doctor/
** http://www.nerdist.com/2010/10/doctor-who-for-newbies-the-fifth-doctor/
** http://www.nerdist.com/2010/10/doctor-who-for-newbies-the-sixth-doctor/
** http://www.nerdist.com/2010/10/doctor-who-for-newbies-the-seventh-doctor/
** http://www.nerdist.com/2010/12/doctor-who-for-newbies-the-villains-pt-1/
** http://www.nerdist.com/2010/12/doctor-who-for-newbies-the-villains-pt-2-2/
** http://www.nerdist.com/2010/12/doctor-who-for-newbies-the-eighth-doctor-the-wilderness-years-2/
** http://www.nerdist.com/2011/01/doctor-who-for-newbies-the-ninth-doctor/
** http://www.nerdist.com/2011/01/doctor-who-for-newbies-the-tenth-doctor/
** http://www.nerdist.com/2011/02/doctor-who-for-newbies-the-eleventh-doctor/
** http://www.nerdist.com/2011/03/doctor-who-for-newbies-torchwood/