Complex sentence: He then returned to the "Original Toughman Contest" in 2000 as the referee for the televised Fox reality show titled "Toughman Championship Series" ran for four seasons on the FX Network.
Split into simpler sentences: He then returned to the "Original Toughman Contest" in 2000 as the referee for the televised Fox reality show. The show titled "Toughman Championship Series" ran for four seasons on the FX Network.