Complex sentence: Gregory Mantel (Pavel Douglas), a member of The Firm, then arrives on the Square, looking for Chris and forces him to sign the business over to The Firm, leaving Chris no choice but to return to Stockport.
Split into simpler sentences: Gregory Mantel (Pavel Douglas), a member of The Firm, then arrives on the Square in search of Chris. He forces Chris to sign over his business to The Firm, after which Chris has no choice but to return to Stockport.