Every season of Doctor Who is on sale except the most recent. But hopefully you pre-bought that already .
Doctor Who Series 101 SD $9.99
Doctor Who Series 201 SD $9.99
Doctor Who Series 301 SD $9.99
Doctor Who Series 401 SD $9.99
Doctor Who Series 501 SD $12.99 HD $14.99
Doctor Who Series 601 SD $12.99 HD $14.99
Doctor Who Series 701 SD $8.99
Doctor Who Series 702 SD $9.99 HD $11.99
Doctor Who Series 801 SD $12.99 HD $14.99
Doctor Who Series 901 SD $12.99 HD $14.99
Doctor Who Series 1001 SD $12.99 HD $14.99