All Lives End. All Hearts Are Broken.

Time Travel Is Always More Magical Somehow When You Go Into The Past. Traveling Into The Future Is Something You Do, Every Day. You're Just Not Going To Get Very Far. So, I Rather Like The Past Travel.

Never Ignore A Coincidence. Unless You're Busy, In Which Case, Always Ignore A Coincidence.

There's Something That Doesn't Make Sense. Let's Go And Poke It With A Stick.

When Writing Comedy, You Have To Have The Confidence To Believe That There Is Only One Type Of Relationship In The World, And We Are All Having It, That All Men Behave In The Same Way And So Do All Women.

The Doctor...is Embarrassingly Human For An Alien.