This is how Dreadwing learns Skyquake's fate goes in Patch
[Starscream and Megatron lay on berths]
[A flashback of the episode "Shadowzone"]
Starscream: Ah, the grave site of the mighty Skyquake. So quick to reject my authority while you lived. But, as the first of my reanimated warriors, you shall bow to my command.
[He throws a shard into Skyquake's grave. He shoves the other half into his chest]
Starscream: Yes! Power of Dark Energon, be mine! [laughs as he glows purple] Symbiosis! [laughs evilly] I can feel it!
[A quick flashback of the undead Skyquake's arm falling off]
Megatron: I understand he perished that day.
Starscream: Well, Skyquake is neither living nor dead and no doubt continues to wander through some dimensional neverealm in search of his missing limb. [chuckles nervously]
Megatron: It would be wise to keep that to yourself around the warship.
[In the real world, Dreadwing looks mad]
Knock Out: Awkward.
[In Starscream's mind]
Starscream: B-But, does this mean--
Megatron: Yes. I will allow you and your minions to return to our ranks if only because you are more valuable beside me than against me.
Starscream: Oh! Thank the Allspark!
Megatron: Infighting has nearly destroyed the Decepticons during your absence. We must operate as a united front if we are to revive and conquer Cybertron. That means each and every one of us, Knock Out.
[Knock Out stares at his staring face]
Knock Out: [shivers] Megatron sure knows how to patch things up, eh, Dreadwing?
[He turns and sees he's gone]
Knock Out: Dreadwing?
[Outside the Nemesis, Dreadwing stands on the roof. He stares straight ahead for a moment then screams in rage at the sky as the episode ends]