Complex sentence: Grogan's past returns to haunt him in the person of Ronny Delany, who is secretly working with Luganni, recognizes him as Garret, and ties Tim to a chair loaded with explosives in a bid to force Grogan to cooperate.
Split into simpler sentences: Grogan's past returns to haunt him in the person of Ronny Delany, who is secretly working with Luganni. Delany recognizes Grogan as Garret, and ties Tim to a chair loaded with explosives in a bid to force Grogan to cooperate.