The Samsung TV app has been known to sometimes have timeout/crashing issues when using a variable broadband connection. This could be related to an issue with your router, your connection speed, or other devices on your network constraining the bandwidth available to your TV.
We would recommend turning off all other devices connected to the internet in your home network, and connecting your SmartTV to your router with an Ethernet cable, rather than relying on WiFi (if you aren't already using a cable).
If the app is still crashing consistently with only a single SmartTV connected to your network, through an Ethernet cable, please perform a speed test (on a different device, immediately after the playback issue) and let us know the result: http://www.speedtest.net/
If you have tried all of the above and also made sure you have updated to the latest software (instructions available under “Why am I getting a messager saying “Error Code 1002?”), you can try resetting your television to the default factory settings. Go to Support > Self Diagnosis > Reset. If you have not changed the PIN, enter default PIN is 0000. All settings, except network settings will return to factory defaults.
If you are experiencing an issue where a particular episode is crashing at exactly the same point, every time, please let us know and we will investigate possible issues with that particular episode.