LogFAQs > #965029461

Martha is one of those characters that just got the short end of the stick. The Doctor had to be showcased mourning the loss of Rose, considering her importance to the series up to this point, but this just mean Martha never really got to do anything.

Also I think the middle of this season was so rough because Davies fell ill for a while, which meant he had little to no impact on the production or the writing (because he rewrote pretty much every script during his tenure).