Season 4 Episode 1 of Teachers has some of the characters visiting the graves of three characters from the previous three seasons: Kurt, Brian, and Matt.
blade
damage-control
captain-america-civil-war
title
the-sorcerers-apprentice
dragon-ball-super
zorba-the-greek
pretty-woman
i-am-number-four
suburgatory
fan
how-it-ends
app
shazam
icarly
underworld-blood-wars
the-chase
christopher-nolan
dallas
two-and-a-half-men
colonia
barry-lyndon
bridge-on-the-river-kwai
king-arthur-2004
deja-vu
all-the-way
a-fistful-of-dollars
shrek
dasavathaaram
suddenly-last-summer