There's three of them?

Showdown in Space

"Revenge. That is all that matters to me now." Chris read out loud.

In the flashback, the GUN soldiers were seen breaking into the lab.

"When I began my research, I only wanted to do good. That's why I worked to make the ultimate creature." Gerald said.

Gerald was now shown sitting alone in the lab.

"But the leaders of the project worried that I'd use it to take over the world, so they seized my lab on Space Colony ARK. Then, they took Maria from me, and my like too on a new purpose." he said.

Gerald was now shown in his Prison Island cell.

"Instead of helping people, I would get revenge on them. Night and day I've planned, so long after I am gone, my revenge will be complete." he said and wrote the numbers 00:27:53.

Back in the computer room Chris finished reading the diary entry.

"I've done it. My greatest design is now complete - the ultimate creature, Silver. My enemies think they've defeated me, but Silver will carry out my orders without question. Now it sleeps, but one day in the future, it will be reawakened. Silver will bring total destruction." he said.

Sonic and Shadow looked at each other knowing he was saying this to hide and protect them.

The clock now read 00:17:50:00. The message continued to play around the world.

"...in the coming minutes as you helplessly await your doom..." Gerald said.

In the president's limo.

"Do we have any confirmation on this?" the president asked.

"You've just received a high-priority message from the Director of the Space Agency, Mr. President. Space Colony ARK is moving toward the planet at high speed. The impact will be catastrophic, and it will cause massive destruction." Christina said.

"But if that colony hits us, millions of lives are going to be lost!"

The others looked grim.

"Good luck, Shadow. Even you're going to have trouble saving us this time." Sam said to himself.

At a building several police officers kicked down a door and aimed their weapons at several government agents inside.

"Freeze!" officers said.

"This is a warrant for your arrest. It took a long time, but the truth is out." Captain said.

Topaz and Towers watched from a rooftop.

"The secret room inside the Intelligence Agency had all records of Project Silver. We didn't have a clue until Dr. Eggman hacked into their system and accessed the file." Towers said.

"Good thing do come from bad sometimes." Topaz said and looked up to see the red glow of the descending ARK.

In the ARK the timer neared 00:16:30:00.

"The energy from the Chaos Emeralds has transformed the Eclipse Cannon into a mega bomb. If it detonates, the blast will be more massive than a supernova!" Eggman said.

"The energy from the Chaos Emeralds is also what's pushing us toward the planet. We have to get the Emerald and deactivate them somehow." Tails said.

"Knuckles." Shadow said and everyone turned to Knuckles.

"What? Why me?" Knuckles asked.

"Because you can control all the Chaos Emeralds with that." Sonic said. "I can only Chaos Control."