Question: Around what episode was the term 'foofs' brought into use?
About the article "NCIS (TV series)", section "Name".

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Prior to the launch of the first season, advertisements on CBS identified the show as "Naval CIS".
By the time of the launch of the first episode, "NCIS" was airing under the name "Navy NCIS", the name it held for the entire first season.
Since the "N" in NCIS stands for "Naval", the name "Navy NCIS" was redundant.
The decision to use this name was reportedly made by CBS, over the objections of Bellisario, in order to:
 Attract new viewers (particularly those of "JAG"), who might not know the NCIS abbreviation.
 Disambiguate between NCIS and the similarly themed and similarly spelled CBS series "" and its spinoffs.
(The original title, for instance, was often misquoted and parodied as "Navy CSI", something the show itself referenced in the first episode).
From the season two episode, "Lt. Jane Doe" onwards, the series began using what fans of the show have named 'foofs' – black-and-white 'teases' of something to occur later in the episode.
In the season three premiere, "Kill Ari (Part I)", the foofs had the freeze-frame shot added as well.
Eugene Francis Jnr is a British musician, formerly of the alternative rock bands The Fantastic Super Foofs, Kaptain Black and Dirty Perfect 
"Rocky Horror" creator Richard O'Brien was disappointed that the episode diluted the themes of the musical, and was puzzled that the word "transsexual" was censored.
Matt Kane, entertainment media manager for the Gay & Lesbian Alliance Against Defamation, criticized the use of the pejorative term "tranny" in its place, and found it "particularly alarming" given that the season one episode "Theatricality" presented a negative reaction to the use of a homophobic slur."
Critics had a mixed reaction to the episode.
Todd VanDerWerff of "The A.V.
Club" graded it an "F" and said it was "the worst hour this show has ever produced".
He felt that it was overly-ambitious, and that in attempting to skirt humorously around the issue of transsexuals, the end result was "more offensive than if the show had simply ignored the whole thing to begin with."
Matt Zoller Seitz of "Slant Magazine" called it a "travesty" and criticized "the arms-length treatment of the Frank N. Furter character", and Amy Reiter of the "Los Angeles Times" deemed the episode flawed through its sanitization, despite initially having found the two shows "a particularly promising match".
"The Rocky Horror Glee Show" received several favorable comparisons to previous themed episodes; Erica Futterman of "Rolling Stone" deemed it the best yet.
Both "Entertainment Weekly" Tim Stack and Jarett Wieselman of the "New York Post" preferred it to the Britney Spears tribute episode "Britney/Brittany"; Wieselman hailed it as a "run-away success" that would satisfy "Rocky Horror" fans without being a "homage for homage's sake" like the Spears episode, and Stack felt that "Rocky Horror" was a "perfect fit" for "Glee", due to thematic similarities between the two.
While previous "Glee" tributes attracted criticism for their focus on musical numbers to the detriment of plot, Jenna Mullins of "E!
Online" and CBS News Jessica Derschowitz appreciated that "The Rocky Horror Glee Show" was more story-driven.
Critics generally disliked the focus the episode placed on the adult characters, with many objecting to Will's characterisation.
VanDerWerff wrote that his storyline with Emma "misplac what made either of the characters enjoyable in the first place", and IGN's Robert Canning—who otherwise enjoyed the episode, and rated it 8.5/10—observed that Will was presented as being selfish and a "terrible educator", in contrast to his former role as the moral centre of the show.
Lisa de Moraes of "The Washington Post" initially found the focus on the adults a welcome change, but felt their storyline rapidly became convoluted.
Anthony Benigno of the "Daily News" liked Will less as the episode progressed, and deemed it overall, "Creepy, vaguely uncomfortable, in slightly poor taste but well-intentioned, and ultimately, thoroughly entertaining to watch for reasons I can't quite put into words."
CNN's Lisa Respers France actually enjoyed the episode for the additional depth it brought to Will and his feelings for Emma, as well as Finn and his body image issues.
While Stack commended the male body image storyline, and found it refreshing for a program to examine the objectification of men, de Moraes derided it, and likened Finn and Sam's discussion about eating healthily and working out to an "after school special".
The episode's conclusion—in which Will declares that the original "Rocky Horror" fans and New Directions members are united by their outcast status—was widely criticized, with VanDerWerff deeming it a "series lowpoint", and "a muddled, terrible message, particularly in an episode that seems to have an uneasy relationship with "actual" outcasts, transsexuals."
Both Reiter and Aly Semigran of MTV questioned the resolution, with Reiter stating that it was unclear what message the creators were attempting to convey, and Semigran finding it disjointed, suggesting "The Rocky Horror Glee Show" to be a "rare "Glee" misstep". 
  In what seems to be an Easter egg, in the climactic scene in "Cleaver", just before Sally Boy is killed by Michael, there is a detailed camera shot of a car's rear-view mirror under which, along with the crucifix necklace, hangs the same key chain that Furio Giunta brought back from Italy for A.J.
as a souvenir in the season 4 episode, "The Strong, Silent Type".
Little Carmine explains to his daughter Alexandra that it represents "the sacred and the propane" (mistaking the common phrase "the sacred and the profane").
Christopher's new NA sponsor reminds Christopher in what a poor condition of drug use relapse he was that time when he came into an NA meeting "with a woman," referring to Christopher and Julianna Skiff's affair in "Kaisha" which ended when they broke up and decided to attend an NA meeting.
Carmela believes the character of Sally Boy had sex with the protagonist's fiancée in "Cleaver" because of Christopher's belief Tony had intercourse with Adriana La Cerva behind his back, which refers to the season 5 episode "Irregular Around the Margins."
 The word palimpsest also refers to a plaque (in particular a monumental brass) which has been turned around and engraved on what was originally the back.
This usage was coined by Albert Way in a paper published in "Archaeologia" in 1844.
In planetary astronomy, ancient craters on icy moons of the outer Solar System whose relief has mostly disappeared, leaving behind only an albedo feature or a trace of a rim, are also known as palimpsests or ghost craters In medicine it is used to describe an episode of acute anterograde amnesia without loss of consciousness, brought on by the ingestion of alcohol or other substances: 'alcoholic palimpsest'.
The term is used in forensic science or forensic engineering to describe objects placed over one another to establish the sequence of events at an accident or crime scene.
Several historians are beginning to use the term as a description of the way people experience times, that is, as a layering of present experiences over faded pasts.
In landscape archaeology the concept of palimpsest is used to describe the way different generations alter the landscape of their ancestors.
Palimpsest is beginning to be used by glaciologists to describe contradicting glacial flow indicators, usually consisting of smaller indicators (i.e., striae) overprinted upon larger features (i.e., stoss and lee topography, drumlins, etc.).
The term is also used to describe augmented realities brought about by the melding of layers of material places and their virtual representations.
"Palimpsest" is a disk utility, part of the gnome-systems-monitor that looks at the details of the different storage devices, in particular the hard disks (in the GNU/linux operating system for computers).