Donna could see the Doctor closing his eyes under her touch, but she couldn't resist, all she wanted to do was comfort her Spaceman. When he told her that his head was hurting, she placed the palm of her hand on his forehead, only to feel intense heat. 

"But, you always have a plan..."Donna said to him, getting more worried by the second. "Why do you get yourself into these situations, you dumbo!" She wasn't really angry with him, she was simply too scared to be calm. 

The creatures eventually stopped a couple of feet away from them and Donna got a good look at them. They were tall, green lizard men that stood on two hind legs with tails sprouting from their backs. They were wearing a golden armor, as was the dog creature that stood beside the third lizard man along, growling mainly at the Time Lord. 

"I don't care how you came here, pathetic 'Lord of Time...'" The first lizard spat. "You're kind we're never welcome here and still aren't. We picked up you're signal and came straight here.."

"...straight here to knock some sense into you..." Another Lizard continued, it's tounge sticking out between it's teeth and showing it's rows of sharp teeth. Donna gulped at the sight of them. The Doctor coughed again, and swayed slightly in Donnas grip. "Aww, look fella's, the poor old Time Lord is sick!" 

"What should we do to him and the human?" The first lizard spoke up again. 

"Let's teach him a small lesson before we bag them up and take them to the prisons. Leave the human to me..." 

(// - You can describe the Doctor's attack if you want, I'll leave how he gets injured up to you!)