The Bustrs continue to look into the teleportation problem at the Trinity Mall before coming face to face with their foe, all while continuing to play up their showmances. Jim reels from his injury. Mary Sue chooses not to use her medical training. Ang switches suitors. Shannon stops for coffee. Dmitri and Steve reconnect. 

In the season four finale, former CEO Steve Butts goes through a rigorous rehiring process while producer Holly Molly splits the team into forced showmances. Later, when customers begin to spontaneously teleport around the Trinity Mall, the group investigates and a heated scuffle has dire consequences for one Bustr. 

The Bustrs must deal with a missing Frank the turtle, limited knowledge of the ghost, and a drunken Ang behind the wheel of the freighter as they attempt to close their latest case. 

"The Bustrs split into pairs to search the freighter, each running into increasingly nonsensical clues while looking for the source of the transmissions. Shannon and Ang explore the snack room. Steve and Mary Sue get a tour. Jim and Dmitri startle some teens."

"Office dynamics change after one Bustr retires, two more are hired, and a former employee finds a way to attend a mission remotely. When an off-putting transmission is heard coming from a docked freighter, the team hops aboard to investigate."

The Bustrs and Mystery Inc face off while attempting to clean up the side effects caused by Thing Brian Nelson's master plan. Dmitri takes on Brian. Mary Sue's gas comes back to haunt her. Ang gains control over a new foe. Rhett puts his p key to use. Shannon fights for Francis. Steve takes on a new role. 

The gang enters Mary Sue's peculiar home, but it's what's beneath it that concerns them. Mary Sue plays host. Rhett learns something surprising about the keys. Dmitri deals with his parole officer. Shannon takes Francis under her wing. Ang takes care of some car maintenance. Steve discovers who's behind the mess.

In the season four premiere, a new CEO, a fresh contract with MTV, and corporate bankruptcy all contribute towards some changes around Grave & Bustrs HQ. Later, the gang has an awkward encounter with Mystery Inc when both teams respond to a call after the Pepper Pond public pool fills with blood. 

In the season three finale, lives are lost and loyalties are strained all while a new mayor of Pepper Pond is elected. Ang tries to save Brian Nelson. Rhett attempts to clobber a ghost. Mary Sue receives a message. Shannon awaits election results. Steve makes his big decision. Brad is backstabbed.

In the season three finale, lives are lost and loyalties are strained all while a new mayor of Pepper Pond is elected. Ang tries to save Brian Nelson. Rhett attempts to clobber a ghost. Mary Sue receives a message. Shannon awaits election results. Steve makes his big decision. Brad is backstabbed.