This murder mystery with a sci fi twist is famous for introducing the idea of a crewmember getting into trouble on a foreign planet (forcing the captain into the difficult position of defending his officer while honoring the planet's legal system) and infamous for treating women like sex objects or frightened children depending on the script's need.
The captain's position is the key to the story, and while "Wolf" might be remembered as a quintessential Scotty episode, the true center of the drama is Captain Kirk, putting on his defense attorney hat and attempting to prove his engineer's innocence. Shatner hams it up, sharing the stage with Wisconsin's John Fiedler, a character actor best remembered as the voice of Piglet. With Fiedler playing an alien prosecutor and much of the plot consisting of arguments inside rooms, much of the episode is just talk; but the two actors keep it mildly entertaining for a few acts before Bloch, inspired by his 1943 short story, "Yours Truly, Jack the Ripper", takes things into left field with a climax that turns into a farce. (Not only does the last act become too silly to take seriously from a plot standpoint, it's here that 5'4'' Fiedler is switched out for a stunt double that stands over six feet all).
"Wolf in the Fold" has an interesting idea that would return in better form in "Requiem for Methuselah", but much like "Catspaw", Bloch is unable to find enough successful ingredients to turn the premise into a standout episode.
Remastered Version: The changes in "Wolf" are as basic as they come, with simply a few new shots of the Enterprise in orbit. The new version of the planet sphere (originally a blue tinted version of the "Catspaw" planet) has the main continent in shadow (with lights showing) to tie into the episode's nighttime scenes.