A waste heat recovery system, comprising: a first heat exchanger that receives working fluid from a first portion of a first loop and provides the working fluid to a second portion of the first loop; a second heat exchanger that receives the working fluid from a first portion of a second loop and provides the working fluid to a second portion of the second loop; and an expander that provides the working fluid to a first portion of a common line, the expander comprising: a stator comprising: a first inlet that receives the working fluid from the second portion of the first loop; and a second inlet that receives the working fluid from the second portion of the second loop; and a rotor (500, 602) that rotates relative to the stator; wherein the common line provides the working fluid to both the first loop and the second loop upstream of the first portion of the first loop and upstream of the first portion of the second loop; characterised in that the waste heat recovery system further comprises a recuperator that receives the working fluid from a third portion of the first loop, provides the working fluid to the first portion of the first loop, receives the working fluid from a third portion of the second loop, and provides the working fluid to the first portion of the second loop; wherein the recuperator also receives the working fluid from the first portion of the common line and provides the working fluid to a second portion of the common line. a first heat exchanger that receives working fluid from a first portion of a first loop and provides the working fluid to a second portion of the first loop; a second heat exchanger that receives the working fluid from a first portion of a second loop and provides the working fluid to a second portion of the second loop; and an expander that provides the working fluid to a first portion of a common line, the expander comprising: a stator comprising: a first inlet that receives the working fluid from the second portion of the first loop; and a second inlet that receives the working fluid from the second portion of the second loop; and a rotor (500, 602) that rotates relative to the stator; a stator comprising: a first inlet that receives the working fluid from the second portion of the first loop; and a second inlet that receives the working fluid from the second portion of the second loop; and a first inlet that receives the working fluid from the second portion of the first loop; and a second inlet that receives the working fluid from the second portion of the second loop; and a rotor (500, 602) that rotates relative to the stator; wherein the common line provides the working fluid to both the first loop and the second loop upstream of the first portion of the first loop and upstream of the first portion of the second loop; characterised in that the waste heat recovery system further comprises a recuperator that receives the working fluid from a third portion of the first loop, provides the working fluid to the first portion of the first loop, receives the working fluid from a third portion of the second loop, and provides the working fluid to the first portion of the second loop; wherein the recuperator also receives the working fluid from the first portion of the common line and provides the working fluid to a second portion of the common line.