https://www.inverse.com/article/8944-the-martian-manhunter-shows-up-on-supergirl
The Martian Manhunter Shows Up on 'Supergirl'
Dec 8, 2015 - One of the Justice League's founding members has been hiding in 'Supergirl' in plain sight. Who is the Last Son of Mars?
the martian manhuntershowssupergirl