Among the shows which will be broadcast is Coma Girl, which stars Lead Balloon's Anna Crilly as a young woman in a coma.
The show follows her old school friends - played by Him & Her's Sarah Solemani, Not Going Out's Katy Wix and The IT Crowd's Katherine Parkinson - as they meet at Lucy's bedside.
As Lucy becomes more aware of her surroundings, the comedy begins exploring moments from her subconscious.
Elsewhere, The Angelos Neil Epithemiou Show stars Dan Skinner as Angelos. The studio-based show will feature various characters, include celebrity guests and involve audience interaction. The programme is also described as a mix of slapstick, dancing, magic and singing.
Milton Jones and Dan Evans have written House of Rooms, which follows Milton and his mother as they rent out their spare rooms to various tenants. Milton falls for one of the lodgers, Alice, but is forced into a fight for her affections with new tenant Paul.
Meanwhile, The Function Room follows regulars who have booked a pub's function room being joined by various different characters. The programme has been written by Dan Maier, who has previously worked on shows such as Charlie Brooker's How TV Ruined Your Life and Al Murray's Multiple Personality Disorder.
The Comedy Showcase season will also include Inbetweeners stars Simon Bird and Joe Thomas's new comedy Chickens.
A new sitcom from Alexander Armstrong and Ben Miller and a show starring Vic Reeves and Rhys Darby will complete the lineup.