Episodes rated highest on the IMDb
As of today these are the top ten favorites:
THE TRIP PART 2...Season 4...9.2 rating
THE COUNSELOR...S4...8.9 rating
THE SPELLING BEE...S3...8.8 rating
JOBLESS...S3...8.7 rating
VALENTINE'S DAY...S2...8.6 rating
THE TICKET...S3...8.6 rating
THE COMPETITION...S3...8.6 rating
THE CADET...S3...8.6 rating
STRANGER IN THE NIGHT...S1...8.2 rating
THE OUTCASTS...S1...8.0 rating and THE FIELD...S6...8.0 rating (tie)