If there is one big benefit to the huge amount of late night talk shows out there, it is giving actors the chance to indulge their more playful instincts. Whether that is Daniel Radcliffe rapping or Benedict Cumberbatch emulating Beyonce, there is endless fun seeing those talented people let their hair down.

Latest case in point: Kevin Spacey joining Jimmy Fallon for a Halloween-themed 'Wheel of Impressions' segment.

Spacey's Johnny Carson is good, but it is the Christopher Walken impression when things get really good...