Vast tracts of post Horned God Sláine. The fact that his past was changed, to the point of forgetting who Ukko was, then it suddenly back to normal again, for example.
And that the ABC Warriors suddenly went back to 22nd (?) century Mars from Nemesis' far future, seemingly without the use of time travel.
And that the ABC Warriors suddenly went back to 22nd (?) century Mars from Nemesis' far future, seemingly without the use of time travel.