Complex sentence: Jimmi finally managed to escape by himself on January 21,2010, after Ivor and Sissy had a visit from Rob looking into Jimmi's disappearance, he decided they had to get rid of the Doctor by putting him in the shed.
Split into simpler sentences: Jimmi finally managed to escape by himself on January 21,2010, after Ivor and Sissy had a visit from Rob, who was looking into Jimmi's disappearance. Ivor decided they had to get rid of the doctor by putting him in the shed.