Angel/ Numb3rs crossovers?

[admiralandrea.livejournal.com]

I just had to mention the "Supersymmetry" episode of Angel. Not only did we get Ed Witten - who was the guy referenced by Charlie in Rampage as spending the night breaking spaghetti with Richard Feynman, but Fred also was doing something with P vs NP in the same episode, when Gunn wakes up and finds her writing on the wall in the middle of the night.

So, my question is, any Angel/Numb3rs crossovers out there? Any genre would be fine. Thanks!