Talk about it here.
A "side-step" was the term used on the spine of four early Big Finish Doctor Who audio stories to denote that they explicitly take place in the continuity of the Virgin New Adventures or Doctor Who Magazine comics.
|13||The Shadow of the Scourge||Seventh Doctor, Ace, Benny||October 2000||"A side-step ... into Virgin territory"|
|14||The Holy Terror||Sixth Doctor, Frobisher||November 2000||"A side-step ... into a 2-D universe"|
|33½||The Maltese Penguin||Sixth Doctor, Frobisher, Josiah W. Dogbolter||November 2002||"A special side-step into a 2-D universe"|
|42||The Dark Flame||Seventh Doctor, Ace, Benny||March 2003||"A further side-step into Virgin territory"|