Previously on Doctor Who…

The Doctor exclaims, "California, 1849, right at the height of the Gold Rush."

The Doctor and Rose walk down a mountain side in almost pitch blackness. They both could observe a sparkle coming from the rocks around them.

The Doctor introduces himself to a miner. "I'm the Doctor and that's Rose."

Rose comments to someone else while referring to the Doctor. ""We're brother and sister."

Two miners lay dead on the floor as a miner tells the Doctor and Rose, "They're just lying there in their tents dead."

The Doctor rubbs his hands together excitedly. "Brilliant, right on schedule!"

A chilling voice sounds with malice. "Give me my gold or die!"

The Doctor comments while scanning a body, "No wounds. No scratches. Their heart just kind of suddenly stopped."

A miner introduces the Doctor and Rose to a younger man. "This here is my son, Matt."

Rose and Matt kiss passionately while sitting down alone.

"I'm thinking something might be protecting their gold, something who thinks they own it and might stop at nothing to get it back."

Rose throws open a tent only to see an almost transparent whitish figure in front of them in the outline of a man holding bags of gold.

Matt comments, "The ghost had stolen the gold. What would a ghost want with gold?"

The Doctor adds, "It's the gold that keeps attracting it."

The Doctor brings out his sonic and runs it over a piece of gold. "This should do the trick."

A ghostly figure begins to take shape having the face and body of a miner, but transparent and holding a scowl on its face. It tells them chillingly, "I am the General. I am the protector of the Golden Hills."

Matt yells, "Dad! No! Give him the gold!"

The ghostly miner draws closer while Matt's father tries to back away while grabbing for his gun. He reaches it and begins to fire at the General, but the bullets go right through it while the ghost places its hand on the man's chest.

Matt screams, "No!" but his father falls like a log dying.

The Doctor puts his hands up still holding the small piece of gold.

The ghost laughs. "You will die, all of you." The figure draws closer to the Doctor and reaches its hand out as if to strike him on the chest as Rose and Matt look on…

Read part one, "The Gold Rush" if this trailer isn't enough.