http://www.avclub.com/article/alexander-siddig-being-bashir-quitting-24-and-gett-222045
AVC: How did you feel about the whole “enhancements” story aspect?
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AS: So when that thing came along about enhancing me, I felt they were really trying—cynically—to make me more like Data, so that I would be more popular still, and I felt betrayed. It wasn’t part of our plan! So I just ignored it. And whenever the lines came up, I just screwed them up. It wasn’t that I didn’t deliver them, but the lines that referred to that, I just messed up. The actor has that power. At the end of the day, they have a veto, and that veto is expressed in just making the line rubbish, just losing it. So I’d say the line, because that’s my job and I’m paid to do that, but I said it in a way that hopefully it drifted off and no one really noticed it.