Complex sentence: Eventually Peter comes clean and he and Miss Lomax head off to stop the wedding, in the mean time in an attempt to cause a delay, Michael has kidnapped the vicar, and Jack disguises himself as an elderly replacement vicar !
Split into simpler sentences: Eventually Peter comes clean and he and Miss Lomax head off to stop the wedding. In the meantime, in an attempt to cause a delay, Michael has kidnapped the vicar and Jack disguises himself as an elderly replacement vicar!