The Real McCoy
This summary is of a story arc from the newspaper comic strip Star Trek.

McCoy's ex-wife and her current husband Anton Zauber conspire to alter Anton such that he can take the place of McCoy and enjoy the economic benefits of McCoy's medical patents.

Summary
The story opens with a chemically-powered ship traveling from the Andorian asteroid belt to the Tarsus system. On board are Joann and Anton Zauber. Anton, with the help of a robotic assistant, has just altered his appearance to look like McCoy. His plan is to replace McCoy and reap the economic benefits of McCoy's many medical patents, currently going to Starfleet charities. Anton and McCoy have a history, with McCoy marrying the woman Anton loved, divorcing her, and later providing testimony that got Anton's medical license revoked. To lure McCoy into a trap, Anton laces the water supply on Tarsus II with a bacillus that will create a Rigellian fever outbreak. It can only be cured by ryetalyn, which fortunately the nearby  has. 

When the request for help comes in the ship is in the middle of transporting Zantra, a Zaranite, who is arguing for secession of his planet from the Federation. The ship immediately changes course and heads for the planet. McCoy cures everyone, then rushes to the recently arrived freighter, where his former wife Joann awaits him. Surprised to see her, McCoy is drugged and hidden in an isolation tank. Anton exchanges clothing and begins to pass for McCoy, keeping McCoy alive just long enough to answer questions to help Anton blend in. 

Anton as McCoy acts very oddly: he wants to retire and collect his patent credits, and he has a lackadaisical attitude toward his patients. Dr. Chapel researches McCoy's medical readouts available through the Perscan device and sees that something has altered McCoy since he was on the planet. Meanwhile, one of Zantra's hearts has stopped and Anton is going to try a risky procedure to start it back up. Kirk and Spock, suspecting the truth, head to sickbay, where Spock contacts McCoy through a Vulcan "mind-touch" and learns the truth. Joann confesses all to Kirk right after they learn it from the mind-touch, and the race is on to Anton. Confronting Anton in an operating room filled with fluorine gas (natural for a Zaranite), Anton threatens Chapel. But his patient gets up and pulls his air hose out; Anton collapses to the floor. Both he and Joanne are led away, with McCoy suggesting they both need psychiatric help. It turns out Zantra's heart stopping was normal for his age, as one heart rests while the other works on. Zantra's heart rest state has permitted him the time and rest to reconsider his position, and he will now argue against secession.

Memorable quotes
"As you know, Captain, our belt ornaments contain the Perscan device, which monitors and transmits data directly into the medical computer."
 - Dr. Chapel, reminding Kirk what the black box on his uniform is for

Background information
 The freighter is noted as being chemically-propelled, although it clearly travels interstellar distances.
 This arc included a special insert on the Perscan device (possibly as an homage to what was done in the Dick Tracy comic strip from time to time). In later strips Warkentin included other insets on items like the communicator and tricorder.
 McCoy's daughter's name was established as Joanna in , derived from early draft scripts of . Either Warkentin misunderstood the relationship or believed the younger McCoy household had both a Joann and Joanna.
 The Tarsus system in the story was presumably also home to Tarsus IV, the location of Kodos's executions, but the strip did not mention that.
 The title of this arc is very close to the one that James Blish gave for his version of  in Star Trek #1: "The Unreal McCoy".

Links

Regular Cast
 Kirk
 Spock
 McCoy
 Scott
 Sulu
 Uhura
 Chekov

Other Characters
 Zantra
 Joann Zauber
 Anton Zauber

Real McCoy