Countertransference is where the therapist transfers his feelings onto the client. For example, maybe the client reminds him from someone from his past, so he begins to treat the client in that same way. It's just like transference, but in reverse. Good therapists are aware of when countertransference is happening and can use it to therapeutic benefit.

I've had a little bit of countertransference going on in my dyad. T is aware of it and will state it immediately, so it's on the table and we are aware of it. He keeps a tight rein on it. I appreciate his honesty in acknowledging it to me.