"Where's the damned thing?" - Jack shouted angrily.

If the Hand had a mouth, it'd grin. But the Hand hadn't it, so the Hand stayed soundless in the shadow. Oh, isn't it smart, to make fool of everyone? They thought, the Hand in a jar was helpless. Ha!
The Hand was very lonely, just like the Doctor - the Hand remembered him, but the image of the Doctor was unclear. And now the Hand wanted to find its second half. Like the Doctor took Rose, the Hand was ready to take anyone. The Hand gave a special signal which only another Hand could understand. And the Hand got a reply!
The Hand could feel it so it waited patiently. And here it is! A spaceship! Some zombied fellow came out, said that "Eldrad must live", left something blue on the ground and returned to his spacecraft. A second later he's gone.
Eldrad's Hand, shying, creeped to te Doctor's Hand. Eldrad's Hand was welcomed, so before too long they fondled each other. Everything looked just perfect, but soon it got even better: a portal appeared, and Thing jumped out of it! It couldn't left the signal unreplied.
Hands were very glad and with expressive gestures let Thing know it.
But Jack was not glad at all. He was tired of searching. He sat at some dirty barrel and though that he might need, heheh, an open hand. And at this moment Hands overturned something. As soon as Jack heard the noise, he jumped up. He was very curious after all.
When he found them he was so happy.. And he joined them.
And the next morning everyone wondered why Jack is so puffy but smug.