The Worst of Star Trek: Voyager

The Worst of Star Trek
Voyager

Threshold

Threshold.  For about 10 years this episode held to dubious honor of being considered the worst episode of Trek ever (until Enterprise ended in 2005 with "These are the Voyages" which actually stole Threshold's shit crown).  The crew equip a shuttlecraft with a new form of dilithium and Tom Paris breaks the Warp 10 barrier (read: infinite speed).  After returning to the ship he mutates into a lizard creature.  He then kidnaps captain Janeway, takes her to warp 10 and they both mutate into salamander creatures.  And have salamander babies on a planet.  Even Brannon Braga has admitted this episode was a "royal steaming stinker".

Virtuoso

Voyager meets the Qomar, a species who have never heard music.  They then go totally googoo fan girl over the Doctors opera singing.  Boring premise.  Also the Qomar come across as jerks for fangirling over the Doctor, then just as quickly replacing him with a "superior, more perfect" hologram.  Yawn.

Fair Haven/Spirit Folk

A double entry here, both episodes feature the worst, most annoying, most cringeworthy holodeck program in the franchise, the faux-Irish 19th century "Fair Haven" village.  In "Fair Haven" Janeway falls in love with one of the holo-characters, who she then modifies to make him more attractive. Yawn.  In "Spirit Folk" holo-characters become self-aware and learn about the holodeck and the crew have to deal with the ramifications of this.  Been there, done that.  If only the crew had not rebuilt the program after it was damaged by the anomaly in "Fair Haven". 

Tsunkatse

The "space wrestling arena" episode.  Let's be honest, the only reason this episode exists is as a reason to put Dwayne "The Rock" Johnson on Star Trek.  Pitting Seven of Nine against "The Rock" was obviously only done for eye candy and ratings.  Also the whole concept that the Tsunkatse fighters are in fact imprisoned slaves forced to fight for their lives and exploited for entertainment leaves a bad taste.  

Fury

The return of Kes episode.  Kes, who left Voyager at the beginning of season 4 on good terms to explore her new telekinetic powers returns to Voyager old, bitter and cruel.  Knowing Kes's friendships and relationships on Voyager in the first three seasons it is totally implausible that she would change that much and turn against her Voyager family like that.  The time travel element makes this episode confusing and overcomplicates the story.  For the sake of the character's reputation I think it best to skip this episode.

Honorable Mention: The Fight

The idea of "Chaotic Space" is cool on paper, but it doesn't really work in practice.  Starting the episode at the end and then going back in time to earlier events, and intercutting events on the ship with Chakotay's boxing hallucination I supposed is intended to illustrate the chaotic nature of Chaotic Space, but it just makes the episode feel disjointed and incoherent.  Pass on this one.