Science Cat does not reappear until Season 7's "Flute Spell," where he mentions Shark died of old age. In "I Am a Sword," he brings a new companion, Spear Bear, for his daily fight with Finn, but notes Finn's heart isn't in it. He appears to have a relatively friendly relationship with Finn and Jake aside from fighting with them on a daily basis.
Science Cat is an orange tabby that walks upright. He wears Ray Ban glasses attached by a strap, appears to have a mustache, wears a short, white labcoat with what appears to be a pocket-protector, and has a mohawk. His status as a scientist is established by his labcoat, potions, and demonstrated knowledge of mixing chemicals. Unlike many scientists in the show, he does not have a Scientific Parasite in his pocket.