Argumental is a British improvised comedy panel game with Sean Lock as host, alongside two teams captained by Robert Webb and Seann Walsh, debating and arguing on various topics with help from various guests. It is made by independent production company Tiger Aspect Productions for Dave and made its debut on 27 October 2008. Series three was commissioned for Dave and four episodes from the second series aired on BBC Two, making it UKTV's most successful commission in terms of reach of audience. A fourth series began airing on Dave HD on 3 November 2011, with its second half still to be aired.