MGF Moment I

Suppose $X$ is a random variable with MGF given by $M_X(\theta) = \dfrac{1}{1 - \theta^2/2}$ for $|\theta| < \sqrt{2}$. Find $\mathbb{E}\left[ X^{2k} \right]$ for all integers $k \geq 0$. Report the answer with $k = 4$.