See if this works for you:
If([AllSameSeries], <font alpha="50">Delimit(TVInfo(SeasonEpisode))<//font>[Name], TVInfo(NameDisplay)) <font alpha="50">TVInfo(DateNoTime)</font>
Here are the removed parts in red:
If([AllSameSeries], <font alpha="50">Delimit(TVInfo(SeasonEpisode))<//font>[Name]Delimit(Watched(2), , / ), TVInfo(NameDisplay)Delimit(Watched(2), , / )) <font alpha="50">TVInfo(DateNoTime)</font>