History TimeyWimeyBall / LiveActionTV

* ''Series/{{Continuum}}'' has a ''literal'' Timey-Wimey ball, since there are eight pieces that magnetically grab onto each other and when they do so in the presence of sufficient power, it activates and zaps anyone within a certain radius to a new destination time.

* ''Series/QuantumLeap'' is definitely not a StableTimeLoop, since the entire premise revolves around active changing the past, and there are several {{Ripple Effect Indicator}}s in the future that are observable by the audience (such as "Honeymoon Express", where Sam's changing of the past results in a different senator reviewing the Quantum Leap project in the future). However, there are other instances where Sam is implied to have BeenThereShapedHistory (such as using the Heimlich maneuver on Dr. Henry Heimlich in "Thou Shalt Not..."), and it's also implied that Sam (as a child) learned his theory of time travel from Moe Stein after Sam (as a time-traveling adult) suggested the "ball the loop" theory to Moe in "Future Boy"... which would not be possible if it wasn't a StableTimeLoop.

** ''Series/StargateAtlantis'' had two episodes in the vein of "2010" and "Moebius", following pretty much the exact same conventions in both.

* While each ''Franchise/{{Terminator}}'' movie managed to be internally consistent, ''Series/TerminatorTheSarahConnorChronicles'' combined the continuities of the first two movies and then added some of its own time travel plotlines. Predictably, it's getting a little weird.
** The episode "Complications" is particularly troublesome. It introduces a new stable time loop and strongly implies that Derek and Jesse don't come from the same version of the future.
** Later in the series, there's so much timeline alteration going on the human time travelers start using the ever-shifting date of Judgment Day to determine which timeline they came from.
** There's also the terminator that was sent to the wrong year and ended up having to build a building. Things get complicated when you try and work out how such an early intrusion into the timestream plays out with all the time-travel shenanigans already going on. Being a new model terminator at the earliest point in time raises many questions. Did that one with new orders cause the current events? Would it still arrive in the past if that chain of events were excised?

* ''Series/{{Timeless}}'' for the most part appears to be fairly established in its time-travel rules. It ''is'' possible to change the past, though the result is usually a CloseEnoughTimeline. And yet, [[ForWantOfANail the Butterfly Effect]] is a very real danger, except when it comes to ''big'' historical events (a case in point - the protagonist's sister is inadvertently erased from existence because of small changes to a particular historical event, but the premature death of as important a historical figure as [[spoiler:Lord Cornwallis]] doesn't completely change American history. RippleEffectProofMemory applies to time-travelers, but there is no RippleEffectIndicator - objects that are taken to the past in the machine retain their original state irrespective of changes to the timeline. The major contradiction though is despite all this, the series seems to be getting up a StableTimeLoop - one of the main antagonist's is motivated to try to change history based on a journal he received from the protagonist's future self describing some of the events of the series!

* ''Series/BlackHoleHigh'': "Fate": When Vaughn, having traveled back in time to meet his mother, steals her hairclip as a memento, [[ForWantOfANail all of history is rewritten]] so that his parents never meet, his father becomes a familyless loser instead of creating the wormhole, and Professor Z doesn't get a scholarship from his company to go to college. Which is all well and good. What no one attempts to explain is why, in this new history, Josie never attended Blake Holsey High (Though later events suggest that her presence there may have been engineered to keep her close to the wormhole). To complicate matters further, it eventually turns out that both Vaughn's mother and Josie's father are {{time travel}}ers, so without Pearson's wormhole (the basis for TimeTravel), Josie shouldn't exist either.

* ''Series/TheGoodPlace'': Michael explains that time in the afterlife apparently works like this: while time on Earth moves in a linear fashion that can be represented by a straight line, time in the afterlife curves and loops around until it looks like the name "Jeremy Bearimy" written in cursive letters, and so the denizens of the afterlife call the timeline "Jeremy Bearimy." There's also a dot above the "i" which, described as concisely as possible, is Tuesdays. And also July. And sometimes never. It's the time moment in the Bearimy timeline when nothing never occurs.

** To make matters more complicated, after bringing Ray and Henry back, they returned a bit earlier before Drex destroyed the densitizer that gave Ray his powers, they had the Ray and Henry already there evacuate the building so they could fight against Drex and put young Ray into the machine. Successful, Ray gets his powers back and are brought back to the future, negating the need to bring back the Ray and Henry already in the past. So is it possible an older version of Ray and Henry exist in the present?

** According to [[Wiki/{{Wikipedia}} The Other Wiki]], Hiro can change history as long as he doesn't eliminate his own cause for traveling in time. However, while this rule is sometimes played straight (he can't simply teleport Sylar away, as that would prevent him from meeting Charlie in the first place and he couldn't save her) but other times... not so much (his attempts to save the suicidal employee would eliminate his reason for time travel but it never works out that way. Of course, history doesn't actually wind up changing in that case, so it may not be a contradiction after all).