Beast Machines: Transformers > Season 2 > Episode 5 - A Wolf in the Fold

Watch Beast Machines: Transformers S2E5: Megatron infects Silverbolt with a variety of Hate Plague virus, which he then passes to the other Maximals. Optimus realises they can only stop fighting and hating each other if they all work together - then wonders if Megatron is right.