How to Restore my Podcasts?

I was cleaning out my D drive, where my iTunes files are. I was specifically cleaning out old items in my iTunes library that were used for work. While I was doing this, I accidentally deleted my iTunes media folder, which contained all of my podcasts downloaded onto my computer. I didn't realize this mistake until it was too late and all but the podcast I was listening to was deleted.

I tried re-downloading the individual episodes, but all that did was create duplicates of every episode on my computer from all my podcasts. I don't know what else to do and will likely be missing some great episodes from serial programs I listen to.

If anyone can help me to fix this, I will be eternally grateful.