Doctor Who

 is a Tier 4 Tank that upgrades from Taurus I and Trapbrid at level 45.

Design
The looks identical to Taurus I but it has a Basebrid's spawner on its rear.

Technical
The places the same intangible portals that explode into 4 bullets as Taurus I, and its drones act identically to Basebrid's.

Trivia

 * This tank was an idea by Earth-Kun.
 * This tank was named after the long-running tv show of the same name.