Glad you enjoyed it! That's a great point about memory. And the return of memory so demolishing of self for both John Smith and Professor Yana. This season really is absolutely brilliant, and "Gridlock" is the highlight for me. Could be my favourite episode of the RTD era ("The Girl in the Fireplace" and "Love and Monsters" also spring to mind).

I think it was deborah_judge who once suggested to me that Martha's unrequited love doesn't go to waste, since it's transformed into her 'witnessing' during the last episode that's so important to inspiring the trust/faith of others. But it's a tricky narrative sell on the back of such a lengthy story about romantic love between the Doctor and Rose, and - if I'm being honest - I don't think the nuances of Martha's story line are served by the actor.