 Richard Grieco , known for his role as Dennis Booker on the original 21 Jump Street TV series , appears for the first time as Steve Batando , Mindy O 'Dell 's ex @-@ husband . In 2012 , the New York Daily News called Grieco 's role on Veronica Mars " his last mainstream role " . Ryan Pinkston guest stars as Danny Rossow , a pizza shop employee . He would go on to make a guest appearance on series creator Rob Thomas 's later show Party Down . Robert Ri 'chard appears as Mason , Wallace 's friend . 
 Richard Grieco , known for his role as Dennis Booker on the original 21 Jump Street TV series , <a href='uninflect' title='1'><mark>appears</mark></a> for the first time as Steve Batando , Mindy O 'Dell <a href='null_genetive' title='2'><mark>'s</mark></a>ex @-@ husband . In 2012 , the New York Daily News called Grieco <a href='null_genetive' title='3'><mark>'s</mark></a>role on Veronica Mars " his last mainstream role " . Ryan Pinkston guest stars as Danny Rossow , a pizza shop employee . He would go on to make a guest appearance on series creator Rob Thomas <a href='null_genetive' title='4'><mark>'s</mark></a>later show Party Down . Robert Ri 'chard <a href='uninflect' title='5'><mark>appears</mark></a> as Mason , Wallace <a href='null_genetive' title='6'><mark>'s</mark></a>friend . 
Richard Grieco , known for his role as Dennis Booker on the original 21 Jump Street TV series , appear for the first time as Steve Batando , Mindy O 'Dell  ex @-@ husband . In 2012 , the New York Daily News called Grieco  role on Veronica Mars " his last mainstream role " . Ryan Pinkston guest stars as Danny Rossow , a pizza shop employee . He would go on to make a guest appearance on series creator Rob Thomas  later show Party Down . Robert Ri 'chard appear as Mason , Wallace  homie .