I'll give it a go... :S

the planet of Halvom (?!) where...

Great idea. I was thinking of doing this on the Amy/11 spot!

the natives were a race of homicides...

it's cool:)

who kept giant insects as pets.

Then out of the blue a gigantic...

peach flew from the insects mouth and knocket Rose out.

"Well then, who are you?" Rose asked, unaware it was the Doctor.

she asked it again...

the Doctor's mouth drop open Rose?
(kay can I please ask for a rule:do not use it to be mean to your least favorite..gah I hate it when people do that.)

"Yes, handsome, that's me. Now who are you, twig head?"

"Umm....I'm the doctor" he said with a half smile.
Aha, i love these games :))

Rose looked at the Doctor Suspiciously, "Doctor Who?" Rose asked.

"I've already changed Rose, it's me" He said calmly.

"Who's she?" Amy interrupted.

Rose suddenly realized it was the Doctor.

The Doctor said: "Amy, this is Rose Tyler, Rose was one of my companions."

Amy stepped forward. She had a competitive look on her face, "Ehh, seen worse". Rose's eyes widened in shock. You could hear the doctor say a faint "Oh no" in the background as he knew this wouldn't end well.

Suddenly, ALL the Doctors and companions showed up. Martha said to Rose:"Oh, so it's the chav again. Hello." Intimidated, Rose stepped toward Martha and pushed her away. "Quiet!" Rose yelled. Amy said:"Doctor, who are all these people?" The 11th Doctor said:"Well, um, they're-" "We're the Doctors, incarnations of him!" The 2nd Doctor pointed at 11.