 The tank scene was created completely using CGI. The only actual footage from the scene was the background. A computer-generated tank, along with women, were designed on a computer. Then, special effects shots of smoke and explosions were layered on top of the vehicle to give it a more life-like appearance. Bruce Harwood, who portrayed Byers, noted that the action sequences in the episode were a challenge. He explained, "It's pretty difficult on a set when the stuntmen come up to you and go,' Don 't worry, you'll be safe, Nothing to worry about. Okay. Everyone put their safety glasses on. '"
