Lots of wonderful stories!
Jeff Brodgen's "Two become one"
Margaret Brignell's "Only you" series
Yvonne Connell's "Addicted", "Damaged", "Fear of discovery" series;
Chiara Prato's "Lois's return"
Carol Malo's "Connections: an alternate story";
Nan Smith's series beginning with the "How I spent my Christmas vacation" story;
and if you like to think there is more than one alternate universe:
ML Thompson's "Without a Superman" series
Mobile Richard's "Life in a different world" series;
Wendy Richards's "Strange visitor from the Congo";
Wendy Richards and Tank Wilson's "Soul...Mates?";
Yvonne Connell's "Kidnapped!"
Leela "Long strange trip"
Chris Carr "An extraordinary man" I&II
... probably many more I don't remember in this moment!
simona