Brian Cox and Robin Ince host a close encounter of the first kind with comedian Lucy Beaumont, astronomer Maggie Aderin-Pocock, Prof Tim O’Brien and science presenter Dallas Cambell to ask if UFOs and aliens have visited Earth.
1998
1973
1995
1993
1992
2000
1997
2004
1960
2006
2005
2002
1999
2001
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1987
2007
