While riding out a neutronic wavefront, the Voyager crew partakes in a holoprogram of an Irish village.
This episode provides examples of:
Ahem: The Doctor, so Harry Kim isn't stuck with the awkwardness of discussing the Captain's private life.
Artistic License – Religion: One of the villagers tells the Doctor, who's playing the village minister, that he's "broken the Fifth Commandment again." The Doctor then effectively brushes him off with "ten Our Fathers," even though the outfit, the usage of "Our Father," and the Irish setting means he's likely playing a Catholic, and the Catholic Fifth Commandment is "Thou Shalt Not Kill."
Bar Brawl: Michael Sullivan starts one while upset over losing "Katie O'Claire."
Delete The Hypotenuse: Captain Janeway realizes that Michael Sullivan is married, so she erases the wife so that she never existed in his life.
Foreshadowing: Seamus catches on when Janeway and the others mention the neutronic wavefront, hinting to the events of "Spirit Folk."
Also Tom Paris says he'll have the program up and running in six to seven weeks.
Has a Type: And what if you could change someone to be that type?
Hypocritical Humor: The Doctor bets five shillings against Harry in an arm-wrestling match with the local favorite. After Harry wins, he says "I knew you could do it, Ensign!"
The Internet is for Porn: Janeway's first sexual relationship is with a holodeck character. Chakotay drops a hint that he's indulged in that too.
I Want My Beloved to Be Happy: Janeway is embarrassed when Chakotay catches her hanging on Michael's arm. Although he can't resist teasing her about it afterwards, Chakotay also makes it clear that she should go ahead and have some fun.
Married to the Job: Averted; Janeway is working late as usual, when she decides to slip into Fair Haven and talk to that hunky Irish bartender. The Doctor eventually points out how absurdly limited her romantic prospects are anyway, so this could be the healthiest thing for her.
Voodoo Shark: Besides the already-established VS with the holodeck power, apparently there's an entire sequence to shutting it down that causes data loss if the program isn't saved. Even though it's only taken "Computer, end program" to turn it off.
Walk and Talk: The Doctor and Janeway walk through the corridors while discussing certain sensitive issues.
You Talk Too Much: When the Doctor suggests an expanded role for his priest character, Tom suggests a monastery where he takes a permanent vow of silence. Janeway finds this Actually Pretty Funny, but Doc is not amused.