Question: What is the name of a 45-minute-long crossover episode dedicated in memory of Louis Castellaneta?

Context articles: Clown in the Dumps
Casualty@Holby City
Britney 2.0 (EP)
Dan Castellaneta
Alan Turner (Emmerdale)
The Simpsons Guy
Glee: The Music, The Power of Madonna
Private Screenings
Britney 2.0
Castellaneta Cathedral

"Clown in the Dumps" is the season premiere of the twenty-sixth season of the American animated television series "The Simpsons", and the 553rd episode of the series overall.
 It first aired in the United States on the Fox network on September 28, 2014, with "The Simpsons Guy", a crossover episode of "Family Guy" with "The Simpsons", airing afterwards.
 This episode was dedicated in memory of Louis Castellaneta, the father of "The Simpsons" voice actor Dan Castellaneta.
 It was written by Joel H. Cohen and directed by Steven Dean Moore, with Don Hertzfeldt directing a sequence in the opening titles.
 Jeff Ross, Sarah Silverman and David Hyde Pierce guest starred as themselves, with Jackie Mason and Kelsey Grammer reprising their respective roles as Rabbi Krustofski and Sideshow Bob, while Maurice LaMarche voiced several minor characters.
Casualty@Holby City is a series of special crossover episodes of BBC medical dramas "Casualty" and "Holby City".
 While "Casualty" was launched on 6 September 1986, and its spin-off "Holby City" was first aired on 12 January 1999, the first full crossover episode between the two programmes was not broadcast until 26 December 2004.
 As of 27 December 2005, four crossover specials have been aired, comprising nine episodes total.
 Although further crossovers of storylines and characters have since occurred, they have not been broadcast under the "Casualty@Holby City" title.
Britney 2.0 is an extended play (EP) by the cast of the musical television series "Glee".
 It contains eight songs from the season four "Glee" episode of the same name, "Britney 2.0", which was the second tribute episode dedicated to American pop singer Britney Spears.
 The EP is composed of six songs and two mash-ups of Spears songs from her debut album "...Baby One More Time" up to her seventh studio album "Femme Fatale".
 The EP was only released digitally.
Daniel Louis Castellaneta ( ; born October 29, 1957) is an American actor, voice actor, comedian and screenwriter.
 Noted for his long-running role as Homer Simpson on the animated television series "The Simpsons", he also voices many other characters for the show, including Abraham "Grampa" Simpson, Barney Gumble, Krusty the Clown, Sideshow Mel, Groundskeeper Willie, Mayor Quimby and Hans Moleman.
Alan Jonathan Turner is a fictional character from the British ITV soap opera, "Emmerdale", played by Richard Thorp.
 He debuted on-screen on 23 March 1982.
 Thorp died on 22 May 2013 and his last scenes that Thorp filmed were aired on 4 June 2013 in a special hour-long episode dedicated to him.
 It was announced on 12 September 2013 that Alan would be killed-off in late October with his daughter Steph (Lorraine Chase) returning for his funeral.
 Alan died in his sleep on 24 October 2013.
"The Simpsons Guy" is the first episode of the thirteenth season of the American animated television series "Family Guy", and the 232nd overall episode.
 "The Simpsons Guy" is a 45-minute-long crossover with "The Simpsons", and was written by Patrick Meighan and directed by Peter Shin.
 It originally aired in the United States on September 28, 2014, on Fox, where both "The Simpsons" and "Family Guy" have aired since their respective debuts.
Glee: The Music, The Power of Madonna is the debut extended play (EP) by the cast of the musical television series "Glee".
 It contains eight songs from the season one "Glee" episode, "The Power of Madonna", which was a tribute episode dedicated to American recording artist Madonna.
 She had sold the rights to her entire catalog of music to "Glee" in 2009, and producers of the show developed the episode called "The Power of Madonna"; the show featured a number of cover versions of Madonna's songs by the cast.
 The accompanying EP released with the airing of the show was called "Glee: The Music, The Power of Madonna".
Private Screenings is a television documentary and reality series airing on Turner Classic Movies since 1995, and one of three original programs currently aired by the network, the others being "The Essentials" and "31 Days of Oscar".
 The series is hosted by Robert Osborne and features noted personalities from the Golden Age of Hollywood, with clips from his or her work.
 A special episode dedicated to Osborne aired in 2014.
"Britney 2.0" is the second episode of the fourth season of the American musical television series "Glee", and the sixty-eighth episode overall.
 Written by Brad Falchuk and directed by Alfonso Gomez-Rejon, it aired on Fox in the United States on September 20, 2012, and features "Glee"'s second episode dedicated to the music of Britney Spears.
 This episode features, the New Directions attempting to cheer up a depressed Brittany Pierce (Heather Morris) with Britney Spears songs.
 Special guest star Kate Hudson returns as Rachel's dance instructor, Cassandra July.
Castellaneta Cathedral (Italian: "Duomo di Castellaneta; Cattedrale di Santa Maria Assunta" ) is a Roman Catholic cathedral in Castellaneta, province of Taranto, Apulia, Italy, dedicated to the Assumption of the Virgin Mary.
 It is the episcopal seat of the Diocese of Castellaneta.