A scientist working at a shark research lab is found dead on a runaway boat. Mack suspects the death is a meticulously planned murder.

A rock star is murdered in a locked theatre, forcing Mack to uncover the truth hidden in the band’s decades-old history.

A CEO is poisoned during a spiritual ceremony at a corporate retreat, but the killer’s method defies explanation.

When Colin’s friends visit from England, one of them wakes up to find a stranger’s corpse in his locked motel room, with no sign of how the killer got out.

A crime writer is found stabbed to death in his villa after announcing his controversial comeback book at a literary festival, but all of the suspects were on stage at the time of the murder.

Mack interrupts Glenn and Daisy's wedding when an uninvited guest collapses, poisoned by a seemingly random wedding program. But by halting the wedding, has she finally pushed Glenn too far?