Part 0: Disclaimers and notes
Disclaimer:
The series represented in this fic do not belong to me. The Tomorrow People elements belong to Roger Damon Price, Tetra Films, Thames Television, and Nickelodeon. The Power Ranger and Mystic Knights elements both belong to Saban.
Ian, Teresa, Lucas, Vanessa, and Teague are all mine, as is the plot.
End disclaimer.
This is a crossover with two crossover universes and one television series. In case you're not familiar with them (or want to see where these fall on the timeline), I've included a summary below for each.
"Opposites Attract" is a Power Rangers/Tomorrow People (new series) crossover universe. In this world, both the Rangers and the peaceful telepathic-teleporting Tomorrow People exist, and have discovered each others' existance. Rocky has broken out (become a Tomorrow Person), and many of the original stories deal with him coping with what he's become.
This story falls during the second part of "Opposites Attract", where a second generation of Rangers is fighting a new foe and trying to follow in their parents' footsteps. As it is after the events of "Expected Changes", ex-Yellow Ranger Teresa DeSantos has broken out and is herself trying to adapt to the new dimension of her life.
"Tomorrow's Future" is a Highlander/Tomorrow People (new series)/Sliders crossover universe, although this story deals almost exclusively with the Tomorrow People end. In this universe, the Tomorrow People have discovered the existance of the Immortals (people who live forever except after their heads are cut off), thanks to meeting the Immortal Greer Lewis.
In the "Tomorrow's Future" timeline, this story is set somewhere in the 2050's, after the events of "Mistakes" but before Melinda (Vanessa's sister) marries. (Between the events of "Never Alone" and "Hoppers", for those familiar with TF.)
"The Mystic Knights of Tir Na Nog" is one of the new shows on Fox Kids. It follows the adventures of four young people in what is presumably Ancient Ireland. In these adventures, they find armor and allies to protect their kingdom against an evil queen who's made an alliance with evil faeriefolk.
Note: This fiction is not beta read, and I'm not even sure it's spellchecked. It was written spur-of-the-moment, after one of my characters decided he needed to take a trip in time. (He wanted to go meet the teenaged Hercules- I managed to divert him to Ireland, since the other writer was writing a Young Herc crossover fic.)