Before the war, Thundercracker was a scientist alongside Starscream and Skywarp. Three spent hours in labs, travelling across cities and visiting the homes of the rich to examine and experiment on Beasts that were kept in homes as pets. Before the Primes declared Beasts as free sparks, the Senate captured any rouge Beastformer and sold them to the highest bidder. Thundercracker hated these home visits. His trine members would hate them even more. Neither of the three thought the experiments were ethical. The day that the Primes freed the Beasts, they were ecstatic and ready to celebrate, but then the war hit. Now millions of years later, the trine waited around on the bridge of the Nemesis for Megatron to return, bored as they were. Thundercracker watched the doors in curiosity. The doors open up as Megatron returns with troops in tow, the three turn their helms his way and stand up. The troops move aside, and Thundercracker's optics widen in shock. There you were. The very Beast that he experimented on. The one he hurt.