User blog comment:NJGW/The Robot Wars Forgetmebots/@comment-9751413-20180924164823/@comment-27162079-20180924170700

Yes, and that's the reason why The Parthian Shot didn't lose Heat F. For Heat E, it was just deemed that Pain was the most forgettable because nothing else stood out as an easier option, really. I guess ORAC was quite lucky, but the "Revenge" part of the Series 3 machine helps it.