Atomic Train is a 1999 American made-for-television disaster-action-thriller miniseries about an accidental nuclear explosion destroying the city of Denver, Colorado.

An employee, John Henry Bradshaw, decides to save money by concealing the bomb on a freight train which is also loaded with hazardous and flammable chemicals, bound for Denver.

The lead engineer, Wally Phister, crushes his hand as he unsuccessfully attempts to re-connect the hoses before they reach for the portable derailer set up by the Denver Railway Control at Silver Gorge.

Ed Brown and Christina Roselli abort the planned derailment after they are warned by another employee from Bradshaw Disposal Systems of the bomb's presence, which allows John to catch up and couple the runaway to engage its brakes, slowing it down.

John eventually locates the bomb inside a boxcar, and relays the information to Denver Railroad Control, finally confirming the threat.

The final crew member to be left behind, conductor Stan Atkins, attempts to re-connect the air hoses but falls off and dies.

Now completely unmanned, the train speeds down the mountain and careens off the track at Millers Bend, the final derailment site near Denver.

Firefighters and military teams struggle to extinguish the fire and extract the bomb, but are forced to retreat to evaluate a strategy as the chemicals combust around them.

One of the helicopter crew misinterprets the order and dumps water onto the wreck, triggering a nuclear explosion and releasing an electromagnetic pulse that wipes out all electricity in Denver and sending a shockwave that tears through part of the city.

Further ahead, Mac is crippled due to an accident and Chance is left hanging precariously over the deep mining pit while trying to rescue his father.