When does Elliott from Earth return?

Elliott from Earth is a British animated television series created by Guillaume Cassuto, Mic Graves and Tony Hull for Cartoon Network, and produced by Cartoon Network Studios Europe. The show follows an 11-year-old boy named Elliott and his mother Frankie who travel around Earth to study 65-million-year old rock meteorites. One night, the two accidentally power up the rock, revealing it to be alien technology with an ability of turning into a transport sphere it launches two into space. Transporting them to another side of the Universe, they ended on a large space station called the Centrium. There, they meet a dinosaur who names himself Mo, and which lost the rock in the wilderness of a biosphere.
Elliott and his mother Frankie travel around looking for meteorites on Earth to further study a 65-million-year-old rock which appears to be from space but lacks a fusion crust. One night, the two accidentally power up the rock, revealing it to be alien technology that can turn into a transport sphere and launch into space. The sphere transports them to another side of the Universe, where they end up on a large space station called the Centrium.