The lock screen controls are limited. How can I see more controls?
For Android 5 and above, If the player is 1 row, you may expand it to 2 rows by "dragging down" with your finger. Note some devices don't support this, e.g. LG G3.
For earlier Android versions, you may long-press the play controls to reveal a seek bar. If you'd rather jump within the episode when tapping << and >> instead of skipping to previous/next episode, you can change that in play settings.