Complex sentence: Guests that featured in the series were Miss Esme Harkness, a retired prostitute, who took a shine to Monica, James Cornell, Monica's first love as well as Maggie Rigby, a school friend of Adele's, and her father, Lawrence.
Split into simpler sentences: Guests that featured in the series were Miss Esme Harkness, a retired prostitute, who took a shine to Monica and James Cornell, Monica's first love. Another guest featured was Maggie Rigby, a school friend of Adele's, and her father, Lawrence.