These are the stories I count as crossovers. (A few others here and there may have mentions, allusions, or even brief appearances by otherfandom characters, but I’ve chosen not to list them.)
B = Backstage story - I = Independent story - D = Drabble
B06 -
Morning’s EchoB12 - …
Than Meets the EyeB16 -
the Human TouchB21 -
Glass CeilingI02 -
Critical ReviewI04 -
Seeking the WomanI09 -
How Wide the GateI17 -
the Silence in the Spaces BetweenI18 -
Reversible ErrorI22 -
Tea and OrangesI33 -
Beneath the Bitter SnowsI36 -
the Song Remains the SameI37 -
Down the Ringing Grooves of ChangeD07 -
Check and MateD17 -
Official AttentionD19 -
Dead to Rights