Beast Machines: Transformers

The Maximals awaken on their homeworld of Cybertron, with no memory of how they got there. Unable to Transform, they are hunted down by mindless vehicle Transformer drones. 

The Maximals learn how to transform and gain access to the Council Citadel. There, they learn that Megatron has taken over the planet and intends to wipe out all organic life. 

As the Vehicon Generals continue to hunt the Maximals, Rattrap discovers a counter-virus that helps him Transform but once he starts, he can't stop. 

The Maximals discover a new Beast Mode Maximal a bat named Nightscream and a mysterious fruit tree, neither of which should exist on the machine world of Cybertron. 

Rattrap finally learns how to Transform, only to discover his Robot Mode has no weapons. With nowhere else to turn for protection, he strikes a deal with Megatron.

The Maximals discover a junkyard facility where the robot shells of the missing Transformers are stored. Meanwhile, Blackarachnia is utterly convinced that Thrust's spark is Silverbolt's. 

Cheetor leads a dangerous mission to try to bring out Tankor's old Maximal personality. In doing so, Rattrap discovers a major clue to the Maximal's missing memories and discovers that Tankor has Rhinox's spark. Jetstorm removes Blackarachnia's spark. 

Nightscream fights to retrieve Blackarachnia's stolen Spark. Meanwhile, Optimus is able to contact Rhinox's Spark, but Rhinox deals him a major surprise. 

Megatron sends his Generals and Diagnostic Drone into the catacombs to kidnap Nightscream and learn the secret behind his Beast Mode. Nightscream is forced to relive a painful memory from his past.

Tankor uncovers an ancient weapon with the power to turn organic material into cybernetic metal. Nightscream gets hit by the weapon and the Maximals race against time to save him from going off-line, while Tankor's circuits overload for using the Key of Vector Sigma and permanently deactivates. While Megatron and the Maximals are unaware of his schemes, Tankor staged his own death by establishing a double before confronting the Maximals. 

Rattrap uncovers a catalyst program that speeds up the growth of Cybertron's newfound plant life. Meanwhile, Blackarachnia discovers that Thrust's spark is actually Waspinator's and that Jetstorm's spark is Silverbolt's. 

Megatron prepares a doomsday weapon that can wipe out everything organic on Cybertron including the Maximals. Meanwhile, Optimus discovers his own doomsday weapon...