Regular Show Season 2 Episode 18: Do Me a Solid
When Mordecai forces Rigby to go on a double-date with Eileen, Margaret and himself, Rigby accepts, but only if Mordecai owes him ten "solids", or "instant-favors", and plans to use them to sabotage Mordecai's date.
Aired 2011-05-02 · 11 min
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