From the moment Felicity Smoak was teased as potentially dead at the end of the Arrow Season Four midseason finale, fans have calmed themselves by pointing out that they've seen her on the set of the hit series, indicating that she can't actually be dead.
We agree she's not dead, but for other reasons.
In any event, it seems like this spoiler/speculation/rumor has finally frustrated producers, who are trying to maintain the suspense about what happened to Felicity when her car was shot up back in December. Showrunner Marc Guggenheim took to Twitter this morning to say this:
I don't normally comment on spoilers, but an upcoming episode features a Felicity HALLUCINATION. Make of that what you will. @EmilyBett— Marc Guggenheim (@mguggenheim) January 9, 2016
Some fans are taking it to mean that Felicity herself has a hallucination, but most are taking it to mean that somebody (likely Oliver, since he's got a history of such things) hallucinates about Felicity.
But why would that happen if she were hale hearty and right in front of him? That's the next mystery, right?
Arrow returns for the second half of its fourth season -- which will include the resolution of the long-standing mystery of Felicity's parentage -- on January 20 at 8 p.m. ET/PT on The CW.