Greenpeace activist Colin Russell's wife Christine flies to Russia Christine Russell with her daughter Madeleine on Thursday. "I'm not coming home without him," the wife of imprisoned Greenpeace activist Colin Russell said shortly before leaving Sydney for St Petersburg on Thursday. Mr Russell, the last member of the Arctic 30 still behind bars in Russia, is making a court appeal for bail on Thursday night, Australian time. He has been in custody since a protest on September 18, when he climbed the first Russian-owned oil rig to be constructed in the Arctic circle. Colin Russell in a cage in court in St Petersburg during a bail application on November 18. Mrs Russell said she was worried about her husband's fate. "We are still very anxious, awaiting this outcome of Colin's appeal hearing," she said. We just hope that it's going to be a positive. Mr Russell has only been able to contact his family twice since his arrest. "Obviously he's also still on tenterhooks, I suppose, waiting for his appeal to be heard today and be given the nod to walk out - but he sounded better than what he did in the first call," she said. Mr Russell's 29 activist crewmates were released after Greenpeace lodged 2 million roubles ($66,347) in bail per person. They remain in St Petersburg as their bail conditions do not allow them to the leave the country. The Australian, who has had his detention extended to February 24, was denied bail on November 18, but Greenpeace is hopeful that his appeal will be successful, said David Ritter, the CEO of Greenpeace. "It's now almost three months since 30 brave men and women sailed to the far north of the world in order to highlight the crazy activities of the Russian giant Gazprom," he said. Mr Ritter said there was no known way of cleaning up an oil spill in the Arctic Ocean, while increased oil production was only serving to "drive climate change faster and harder." If found guilty of hooliganism, Mr Russell and his Arctic Sunrise shipmates could face seven years' imprisonment.