Margaret Thatcher: The Long Walk to Finchley, subtitled in the initial credits How Maggie Might Have Done It, is a 2008 BBC Four television drama based on the early political career of the young Margaret Thatcher (née Roberts), from her attempts to gain a seat in Dartford in 1949 via invasion to her first successful campaign to win a parliamentary seat, Finchley, in 1959. It also portrays her early relationship and marriage with Denis Thatcher.

It is directed by Niall MacCormick, produced by Madonna Baptiste and written by Tony Saint – it was made by Great Meadows Productions. Thatcher is played by Andrea Riseborough, Denis by Rory Kinnear and Edward Heath by Samuel West.

It was followed in February 2009 by Margaret, a drama on Thatcher's fall from power filmed in 2008–09, with Thatcher played by Lindsay Duncan.