![](https://image.tmdb.org/t/p/original/rgqw8IOILHGTBdTIe8mHvTUGxhR.jpg)
![](https://image.tmdb.org/t/p/w342/3eKmwXE2A394l3GB9eIOy7kYm25.jpg)
The Big Forget
An anti-memory vapor can be useful to villains...and perhaps to Clark Kent when he needs to conceal his heroics.
![](https://image.tmdb.org/t/p/w300/xgsniobMZXe5fEWFC5EKpfAi9Ec.jpg)
![](https://image.tmdb.org/t/p/w300/pIql7oT1SWcSKVCWMzPaObNRLMi.jpg)
![](https://image.tmdb.org/t/p/w300/b3MD7fOThoM0FbXotga0AdSkIBg.jpg)
![](https://image.tmdb.org/t/p/w300/mnK6gfA3nzoIkFDLkazL3p0OE8d.jpg)
Other episodes for this season
![The Last Knight](https://image.tmdb.org/t/p/w300/lEczL5aBoDENUVufXZujahfqAnX.jpg)
![The Magic Secret](https://image.tmdb.org/t/p/w300/4nOCQEvygakOFGyaA3uTf9C765W.jpg)
![Divide and Conquer](https://image.tmdb.org/t/p/w300/AsEJfp7joyoAgmOYBgcpNttb5KU.jpg)
![The Mysterious Cube](https://image.tmdb.org/t/p/w300/3xtvvW9pnNfMGb6WtfvSGKtNjsu.jpg)
![The Atomic Captive](https://image.tmdb.org/t/p/w300/iT27sbaVbIXkOqKxv1sVy2DpzNp.jpg)
![The Superman Silver Mine](https://image.tmdb.org/t/p/w300/zZc8PIh2sgzbIR3GcdwskEPvkej.jpg)
![The Big Forget](https://image.tmdb.org/t/p/w300/rgqw8IOILHGTBdTIe8mHvTUGxhR.jpg)
![The Gentle Monster](https://image.tmdb.org/t/p/w300/p2GvyRDxJ6REnUkuak1dIv6m2E.jpg)
![Superman's Wife](https://image.tmdb.org/t/p/w300/tQLV5L8zUS6l96iwGdVHPs702pk.jpg)
![Three in One](https://image.tmdb.org/t/p/w300/2CFITUuyZMEbav9JsLnjLPmmYXc.jpg)
![The Brainy Burro](https://image.tmdb.org/t/p/w300/7iayYyPuiTMlGVEqiT7kiR5LV23.jpg)
![The Perils of Superman](https://image.tmdb.org/t/p/w300/vXZUHnRbzN1bkPBIP0BGo2h7vt2.jpg)
![All That Glitters](https://image.tmdb.org/t/p/w300/ggFoe8xD7GPR9WrolRvU5wB2w65.jpg)
An anti-memory vapor can be useful to villains...and perhaps to Clark Kent when he needs to conceal his heroics.