Changes from Season to Season
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
During the series' progress, changes are made to various areas to reflect the
show's evolution, or to fix some problems. Some of these changes are noted
below:

From "Encounter At Farpoint" (Pilot) to 1st Season
-================================================-
* Opening credits changed from actor's name only to actor and character name.

* Troi outfit was changed from blue "miniskirt" to nonuniform dress with rank 
  pips removed.

* Troi's hair tied into tight bun.

From 1st to 2nd Season
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* Wesley Crusher changes from shirt with rainbow strip to all grey uniform.

* Worf is made permanent Security Chief (from red to gold uniform).

* Geordi LaForge is made permanent Chief of Engineering (from red to gold
  uniform).

* Geordi & Worf were both promoted to (full) Lieutenant

* Ten-Forward is made as a permanent set.

* Guinan (Whoopi Goldberg) is added to crew as a recurring special guest star.

* Dr. Beverly Crusher (Gates McFadden) is transferred to Starfleet Medical,
  and is replaced by Dr. Katerine Pulaski (Diana Muldaur).

* Cmdr. Riker has grown a beard.

* The Con and Ops chair were changed from the couch style chairs to regular
  style chairs.

* Wesley Crusher was made Acting Ensign.

* Worf wears a new, aluminum-like sash instead of the old, foil-like sash.

* The stardates now advance in a more logical manner during a season instead
  of being somewhat random during TOS and the first season of TNG.

From 2nd to 3rd Season
-====================-
* The first portion of the opening title sequence is replaced from the planets
  to various views of the galaxy.

* Dr. Katerine Pulaski (Diana Muldaur) was mysteriously replaced with Dr.
  Beverly Crusher (Gates McFadden).

* The uniforms were replaced from the one-piece collarless uniforms to the
  looser two-piece uniforms with collars.

* Geordi LaForge is promoted to Lt. Commander.

From 3rd to 4th Season
-====================-
* Wesley was made full Ensign before going to Starfleet Academy. (Menage A
  Troi)

* Star Trek is now broadcast in Dolby Surround Sound.

From 4th to 5th Season
-====================-
* Title sequence was slightly rearranged, with the "Star Trek: The Next
  Generation" logo coming out of a video-tunnel like effect.

* Captain Picard occasionally wears a blue-grey uniform with a red jacket.  
  This was out of Stewart's request because he was getting bored with his 
  regular uniform, and helped design the jacket. The jacket is made out of
  very soft suede and leather shoulders, and cost about $3,000 to make.

* In the conference room, the wall relief containing the Enterprise lineage
  has been changed to some other pattern.

* The Enterprise's commissioning plaque is starting to tarnish.

From 5th to 6th Season
-====================-
* The title sequence was changed, with the "Star Trek: The Next Generation"
  logo returning to the original effect seen in the first four seasons.

* The painting of the Enterprise in Picard's ready room (signed by Andy
  Probert and Rick Sternbach) has been replaced by a piece of sculpture.

* A new Jefferies tube set has been constructed. This set is three stories
  tall, and has ladders, sliding doors, and lots of grating.

* Chief O'Brien now wears a hollow circle (Ensign Junior Grade?)