Treehouse of Horror XXVI (Season 27; Oct. 25, 2015)
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Intro: The Simpson kids are trick-or-treating, but the animation looks like Spumco, and they get chased by ghosts and ghouls, while a song plays that sounds kind of like Thurl Ravenscroft. It was fairly cool.
Wanted: Dead, Then Alive: This was the one thing that everyone knew was going to happen this year before the season even started. Sideshow Bob finally kills Bart. A lot. It was reasonably amusing, I guess.
Homerzilla: It starts out as a black & white parody of Godzilla, then there's a sort of meta twist (or two). It was decent.
Telepaths of Glory: A parody of Chronicle, in which Lisa and Milhouse get telekinetic powers. It was mostly kind of "meh," but it had a decent ending involving Maggie, and then a neat little cameo from Kang and Kodos.
Note: the week before this aired, there was a regular Simpsons episode that was also set on Halloween.