This is a good first story for the decades collection. A young boy starts having dreams about the Doctor's adventures with his companions after an incident with the TARDIS. We basically see someone 'watch' the first two Doctor's on a 'television' inside his mind, and save the day because of it. Gerry gaining knowledge of science and history through his experiences with the Doctor is a nice reminder of the show's roots as an edutainment show, supposed to teach kids about science and history.