AMC's "The Walking Dead" did nothing this week to address the massive cliffhanger of episode three ("Thank You") which left Steven Yeun's fan-favorite Glenn on the verge of death. Instead, episode four ("Here's Not Here") was a bottle episode focusing solely on Lennie James' Morgan and his time after his season three appearance. The episode did not feature anyone from the main cast besides him, which means fans did not get any answers about Glenn's questionable fate.

But for the first time since the show's pilot, Yeun was not listed in the opening credits.

Is that something or nothing?

Some may point to the fact that Yeun was not featured in this episode at all as a reason for his omission in the credits. However, the rest of the cast (Andrew Lincoln, Norman Reedus, etc.) were included despite their absence. Yeun's name is the only major change since "Thank You" aired two weeks ago.

In that episode, Michael Traynor's Nicholas shoots himself in the head when surrounded by a Walker horde. Unfortunately, his body knocks Glenn into the swell of zombies where he is seemingly ripped to shreds. However, several fans have questioned the validity of this death.

For starters, Yeun was not present at that night's "Talking Dead" postmortem following the episode. It has become customary for actors that get killed off to make an appearance. Furthermore, showrunner Scott M. Gimple has said ambiguously that some "part" of Glenn will be seen this season and Yeun has been spotted on set numerous times. Even executive producer David Alpert failed to give a definitive answer when asked about the character's fate.

"We will find out what happened to Glenn," he told Variety. "Whether or not Glenn is alive or dead or something else - the Glenn that we knew, the one that believed in the better side of humanity, I think is dead."

More specifically, a popular fan theory has cropped up that argues that Nicholas was out of bullets so it would have been impossible for him to commit suicide that way. This theory posits that the entire scene was actually Nicholas' hallucination brought on by fear and panic.

Whatever the case may be, "The Walking Dead" will need to address it in the upcoming episode.