It's going to be the Tyne Theatre. Go check the listings - panto starts early December two shows a day til January but guess what no shows listed on 20th December.
For those looking to stay somewhere there's a Jurys Inn near the Arena / Centre for Life in Newcastle whch would be short walk to the Theatre. Holiday Inn express not far away either (forget it's address but next to a restaurant called Barn Asia) or to be honest look for anywhere in the North East close to a metro line as you can walk from Central Station to the theatre in about 5 minutes.