Actor hidden from cinecam but who still had reflection (RT)

Everything good karma angels?
Searching here I only found topics related to application in materials.

I need a solution that some actors do not appear in Cinecam, but still be visible in the reflection(raytrace). To use the Sequencer and Movie Render Queue.

For the reasons;

1- I want to use a normal angle lens
(50, 75 and etc.) for shooting and
photo a distance building to have less
distortion. But the buildings around
him (actors who will not appear in the
film) must continue with his reflection.

2- I am having several problems with
Warm Up Frame Count and Set Actor
Hidden In Game, when using a keyframe
on the Sequencer. It does not work.

Thank you.