We open on Cybertron once again, and see Starscream has finally formed into his "Combiner Combiner" mode. Megatron takes a shot at him, but is thrown across the city, smashing into a building.
While Optimus runs to Megatron, Starscream deals with the amount of power he posses. He envelops him, and he explodes. Bits of the various combiners are thrown across the landscape, and a piece of Computron tries to take out Prime.
Ah, Geez, Rick, what are we gonna do now?
Starscream emerges from the rubble, now only a ball of Galactic Glitter Glue with a head, and launches some missiles(?) from his shoulders(?) at the city below. Optimus and Co. dodge the incoming debris, as Starscream starts making a black hole, sucking all of his loose parts in.
Pictured: Starscream
He "throws" the black hole at Optimus and Megatron, but here comes Windblade, saving the day again with her Turbine Attack, which can apparently stop the force of an inverted star.
Huh.
Never knew.
I...I hate this episode
Windblade follows this up by rushing the literal Screaming Star, while he shoots what sounds to be lasers trying to connect to dial-up internet out of his mouth.
If they lasted any longer, you would have started to hear the Windows XP boot-up noise, too
Windblade is somehow able to block the large, continuous beams of pure energy with her thin sword, but is finally taken down by a lightning blast from Starscream. She falls, many stories, and lands on the ground. Optimus and Megatron have a moment to mourn her before Starscream jumps at them, Screaming and laughing.
I...I really hate this episode
Okay, Final thought time:
Why? Why? You had potential here, those couple of episodes in the middle of the series were great, compared to what has come before and after them. Why make Starscream's plot a cliche Starscream plot? You already had one of the most interesting Megatrons we've ever gotten, why couldn't you have left Starscream be and have one of the most interesting Starscreams we've ever gotten? I want you to challenge my perception of what I already know about these characters, or I want to be pleasantly surprised with a interesting continuation of what I know and love. This series can't decide which of those it wants to be, so it fails miserably at both. It's not a good new idea, or perhaps just poorly executed, and it's not a good continuation of the same old same old. What is it trying to be?
-gasp- Father! Please! Help!
I think this series could have been good, (heck, it could have been great) if it would have picked a lane. As it sits, it comes across as a slapped together mess, with 0 pacing and no cohesive, understandable plot until halfway through act 4. And even then it makes no sense.
If your going to go back on your set idea of different, more civil, changed Starscream, give him a viable motive. He is literally already one of the rulers of Cybertron. He couldn't climb the latter more if he tried. He even said how he convinced the public to trust him. He's where he wants to be! Where he's always wanted to be. Why would he ruin that? Why?
To be continued
Tune in later today/tomorrow when we continue our celebration and conclude the series with the review of episode eight!
And, as always, I'm the Nostalgia Critic, I remember it so you don-wait, wait, no. Wrong thing.
Ahem
And, as always, keep it right here, on seibertron.com for all your latest Transformers news (and reviews!).
Sorry. I read Combiner Wars and skipped over "Machinima". Forgot this cartoon even exists. 
We better get back on topic, though, before Burn yells at us.