Currently available on 5 streaming services.

Streaming, rent, or buy Transformers: Animated – Season 1:

Currently you are able to watch "Transformers: Animated - Season 1" streaming on Pluto TV, The Roku Channel for free with ads or buy it as download on Amazon Video, Apple TV.

Cast

David Kaye
Optimus Prime (voice)
Bumper Robinson
Bumblebee (voice)
Corey Burton
Ratchet / Megatron (voice)
Bill Fagerbakke
Bulkhead (voice)
Jeff Bennett
Prowl (voice)
Tara Strong
Sari Sumdac (voice)
Tom Kenny
Isaac Sumdac (voice)
Phil LaMarr
Jazz (voice)