Ahead of the start of the Lucy Beale murder investigation on EastEnders on BBC One and RTÉ One on Monday April 21, the BBC has released teaser audio promos in which suspects give their alibis.

The whodunit is set to run until the soap's 30th anniversary in February 2015.

EastEnders is on BBC One and RTÉ One on Monday night, April 21, at 8:00pm.