As a pair it stand been responsible segments inside several high profile sketch shows including Harry Enfield and Chums, The All New Alexei Sayle Show and, notably, the Ted & Ralph characters in The Fast Show (though it should be noted that with a few exceptions, the actual Ted & Ralph sketches were written by Charlie Higson and Paul Whitehouse). It likewise contributed to various magazines & wrote surreal liner notes for the popular "Volume" series of alternative music compilations.

All the same, it was using Father Ted (3 series, 1995-1998) that Linehan & Mathews (as the pair are often referred to) made their biggest splash on the public imagination.

Linehan & Mathews each wrote a 1st series of the sketch show Big Train but Linehan bowed out for the second series.

Withal, Linehan has continued to provide lesson for shows which are then held inside high regard, particularly Brass Eye.

Two Linehan & Mathews typically produce cameo appearances around programmes it keep around written. It likewise processed the notable appearance in the staggeringly accomplished sitcom ''I'm Alan Partridge'' as two Irish men considering Alan Partridge (Steve Coogan) for a contract. Often, it went away by using the heavy urge to use individual else (Partridge: "Sunday Bloody Sunday. Really captures the frustration of a Sunday, doesn't it? The kids are running around, you've got all of the papers to read, and you think "Sunday, All-fired Sunday"

Linehan has also appeared in two episodes (episodes 3 & 6) of ''Garth Marenghi's Darkplace.

With Dylan Moran, Linehan co-wrote the first series of Black Books'', a series to which Mathews made a much smaller contribution.

In late 2003, he and Mathews were named one of the 50 Funniest acts in Britain by The Guardian. [http://www.guardian.co.uk/arts/features/story/0,11710,1101525,00.html]

Linehan is an Honorary Associate of the National Secular Society.