This page lists appearances of the Trods in the order in which they experienced them. This timeline is based upon observations of the Doctor Who universe and the events that occur during each of these stories.
- In 2066, the Trods are created by MacTaggart only to turn against him and enslave the human colony on Trodos. They are found by the First Doctor and his grandchildren John and Gillian, who deactivate the Trods and set the humans free.
- The Trods are reactivated by another space traveller. Their attempt at revenge is thwarted by the Doctor and his grandchildren, resulting in their master's death while the Trods themselves are led to be destroyed.
- The Trods pursue the Second Doctor and his grandchildren through time.
- The Trods agree to sign a peace treaty with the Doctor, only to be massacred by the Daleks. However, the Doctor finds surviving Trods who help him to escape their planet as he leaves them to fight the Daleks.
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