After taking elocution lessons, he started to become hooked by the acting bug at school and studied at the Webber Douglas Academy of Dramatic Artist He studied at Webber Douglas Academy of Dramatic Art between 1996 and 1999.
Raido moved to London three years later. He is half Spanish and half Greek. He subsequently worked with the avant-garde theatre company Mabou Mines before starting his television and film career.
Mel made his breakthrough in the play Corpus Christi, where he played Jesus, at the Edinburgh Festival in 1999.
He then went on to appear in numerous plays all over the country and in television dramas such as Midsomer Murders, Red Cap and The Vice. He has appeared numerous theatres in London including the Finborough (I Witness by Joshua Sobol in 2007), the Pleasance (Corpus Christi by Terrence McNally in 1999, and Office Games by Trevor Baxter in 2003), Southwark Playhouse (Eskimo Sisters by Laline Paull in 2002), and Royal Court (Fireface by Marius von Mayenburg in 2000).