002. Donna could remember bits and pieces of her adventures with the Doctor, but only in her dreams. 

When she woke up, she couldn’t remember them. She knew they were very, very strange dreams she’d had that night, but she couldn’t remember their subject matter in any way. Most of all, she knew that, although they’d been strange dreams, they’d been very, very wonderful dreams. 

Often, she’d try to fall asleep as soon as she woke up, just to recapture the feeling of the dream.

(Source: doctorwhoheadcanons)