A fictional character from the [[Star Trek]] original series. Played by American actor "William Windom":https://en.wikipedia.org/wiki/William_Windom_(actor) . 

He appears in the episode [[The Doomsday Machine]] and is in command of the [[USS Constellation NCC-1017]] [[spacecraft]].

[b]Starfleet Commodore Matt Decker[/b] is an old friend of Captain [[James Tiberius Kirk]].
matt decker