History SpoilerOpening / LiveActionTV

* ''Series/{{Yelllowjackets}}'': Even if viewers didn't know who Creator/LaurenAmbrose was or who she was playing, the Season 2 opening credits show her as a red-haired woman with a scarred face, clearly cluing them into the fact that she's playing adult Van, almost four full episodes (nearly halfway through the season) before she's reintroduced to the story. She appears in person in the Cliffhanger ending of episode 4.

** ''Series/KamenRiderFaiz'' clearly shows the main good guy cast in the opening... but with AnyoneCanDie in full effect, this doesn't help much.

* The opening credits of the first series of ''Series/{{Angel}}'' include a brief clip of Doyle's death. But it's not really obvious that's happening until you've already seen the episode.
** Angel also subverts this in the episode after Doyle's death by keeping the credits the same. Wesley would not be added to the credits until the following episode.
** ''Series/{{Angel}}'' averts this a little later with the appearance of Julie Benz as Darla in the Season 1 finale. The actress was not credited at the beginning; instead, she's listed as a "Special Guest Star" at the end of the episode. Listing her at the beginning would have tipped off everyone, and it was a great surprise.

* In the "Then" part of ''Series/{{Supernatural}}'', before the episode, when they recap the events up until that point, they usually focus on important plot points to that specific episode.

** ''Series/MightyMorphinPowerRangers'' avoided Spoiler Openings by introducing them later; for example, the season 3 opening wasn't used until part THREE of "Ninja Quest", the Alien Rangers didn't get their own intro until part TWO, etc.

* In the first episode of ''Series/{{Firefly}}'' aired, the crew (consisting of everyone in the credits) has already been assembled. However, the unaired pilot shows how three of the crew came to join. On the DVD order, the pilot comes first, but uses the credits created for the season as aired. This renders a huge plot point of the episode - finding out which of three passengers is an enemy spy - completely redundant, as two of them are listed in the opening credits. The credits also clearly show [[GirlInABox River in a Box]], which is intended to be a major twist.

** Yet another spoiling intro is in the fourth season: G'Kar saying that it was the year "we took back what was ours." Maybe it's tradition.

** And yet despite displaying awareness of this, the ''[[WhatAnIdiot very next season]]'' released a publicity photo of all of the characters at their desks. Or rather [[TheBusCameBack Ruth]], [[ReplacementScrappy Tariq]] but no [[KilledOffForReal Jo]] or [[PutOnABus Malcolm]].

** Also, there's an easy-to-miss one early in the fourth season of ''Atlantis''. The show reverts to using the previous season's opening sequence (or the credits in it, at least), including Dr. Carson Beckett, who died around the end of the third season. His name is only in the opening credits for one episode, though, so you can chalk it up to a mistake... [[TVTropesWillRuinYourLife unless you've previously read about]] the "Oh, Michael's got a clone to replace the dead original" thing that's going to happen.