Black Friday

Blackarachnia has recovered after trying to get the Allspark, and has seduced Grimlock and his team to free Meltdown so he can use his intelligence in the field of genetic modification to purge her organic spider half. Meltdown, however, needs a certain genetic modifier to complete this task, so Blackarachnia blackmails Optimus and Grimlock into getting it by attacking Bumblebee and Prowl and infecting them with her venom. Whether Optimus and Grimlock can work together isn't the only problem, for Meltdown may not be purging the half that Blackarachnia thinks.