Wisden Cricket is the best serious cricket podcast I reckon. The Final Word is great as well, although two Aussies they're both very fair and balanced and seriously knowledgeable about cricket (both commentated on TMS etc.). Once a week they do this thing where people send them numbers that link it to a part of cricket history and they have to work out what that number is, which is great.
Finally, I'd recommend Red Inker which is with Jarrod Kimber who is a data analyst for various cricket teams, he's extremely knowledgeable and his guests are great (the recent podcast on US Cricket was great) and then he does a Q&A session each week as well, which makes it super relevent. He also does a podcast on cricket history called Double Century, the first series documents the development of cricket, while the second series is about the development of international cricket through charting the first time each test country beat England.
A controversial one, but I reckon The Grade Cricketer is also really funny. It's two Aussies and they don't hold back on England at times and far less serious than the other ones, but I think it's grade.