To watch Interstellar is to conduct a thwarted love affair. You enter with hope, reverence, passion. After all, Christopher Nolan is one of the world's great directors. The relationship starts smoothly enough – you are enchanted by the futuristic world he has created, the characters he has etched, especially by a father-daughter bond that leaves you in tears. But by the mid-way mark, restlessness starts to creep in. The highs are stunning but the lows boggle the mind. And the third act is so clumsy and misguided, that you are aching for the affair to be over so you that you can exit with a heavy heart.