Mark Jameson Mark Jameson was a career Starfleet officer in the 24th century . He joined Starfleet around the turn of the century , and he married his wife Anne in 2314 . By 2319 , he had reached the rank of commander , and was sent to negotiate the release of hostages from Mordan IV . Officially , he successfully negotiated their release . However , in truth he supplied weapons to Karnas , the hostage - taker , in return for their release , and falsified the official records . This was a violation of the Prime Directive , so Jameson made an attempt to even things up by also supplying weapons to Karnas ' rivals , thus causing forty year s of civil war , although he claimed that he had assumed that the resulting conflict would last for only a few years before it ended . Jameson progressed through the Starfleet rank s , eventually reaching the grade of rear admiral . His final command was the . He then contracted the incurable Iverson ' s Disease , and by 2360 was confined to a wheelchair . Unknown to anyone else , however , he had obtained two doses of an age - reversing agent from Cerberus II in exchange for a successful treaty negotiation . He began to slowly administer the medicine to himself . By 2364 he was living with his wife on Persephone V . When Karnas reported a hostage situation on Mordan IV in 2364 , he took both doses and embarked on the to negotiate for their release , at Karnas ' request , in an attempt to vindicate himself . The medicine caused him to rapidly get younger , but was also highly unstable , his unstable health prompting him to admit the truth to Picard , who acknowledged Jameson ' s responsibility for the current state of affairs while also noting that Karnas and others could have chosen to work for peace rather than simply continuing to fight . After learning that the hostages had actually been taken by Karnas in an attempt to lure him to Mordan IV , he mounted an armed rescue attempt . This failed , and by the time he met Karnas face to face , he was dying from the effects of the drug . Karnas , on seeing Jameson die in front of him and on hearing of his attempts to atone for his earlier deeds , was satisfied and released the hostages . Jameson was buried on Mordan IV , at the request of his wife , and with Karnas ' permission . ( ) Appendices . Background information . Mark Jameson was played by Clayton Rohner . In the first draft script of " Too Short a Season " , Jameson ' s first name was " Paul " . He was renamed " Mark " by the time the revised final draft of the script was issued . In a scene that was included in the revised final draft script of " Too Short a Season " but not in the episode ' s final edit , Jameson was mentioned to have been the commanding officer of the and the , in addition to serving as an admiral . Mark Jameson was the second admiral to appear in " Star Trek : The Next Generation " , the first being Admiral Leonard McCoy . Jameson was also the first to wear the admiral ' s uniform seen throughout the rest of the first season of TNG . He is also one of four people to refer to Commander William T . Riker as " Number One " ( the other three being Dr . Beverly Crusher , Sarek , and , of course , Captain Jean - Luc Picard ) . Apocrypha . Jameson appeared in his capacity as captain of the " Gettysburg " in the " " novel " Day of the Vipers " .