I have a unique relationship with Jam, as I'm sure many other viewers do too.
Never before Jam have I watched a comedy show which remains completely compelling even though I found that a good 70% of the sketches weren't conventionally "funny".
That's not to say the series isn't amusing: it is, frequently. A few sketches did have me laughing out loud. But more often than not it produces hushed, disquieted laughs that you almost feel ashamed for producing.
This is to the show's credit, since it deliberately possesses a uniquely weird and disturbing atmosphere. Sketches frequently take familiar situations or concepts and bury them under an insane haze that seems equal parts bad drug trip and delirious nightmare. The visuals and sound frequently distort, rendering even "simple" sketch setups creepy or unusual.
There is almost always an intelligent thought or meaning behind the bleak tone and disorientating effects. One of my favourite sketches features a well-to-do man narrating a story regarding a man's absurd suicide attempt and provides a surprisingly poignant satire of lacklustre mental health care and bystander apathy in society.
The cast is great - Mark Heap is one of my favourite actors/comics, and gives another splendid performance in his varied roles here. Morris' writing and performance is top notch, as is David Cann's and...well, pretty much everyone, really.
The intro clips also bear mention: each episode is opened with Morris performing a very dark and disjointed poetic monologue linking the (usually horrific) fates of several characters. The intros are universally fantastic and really show off the talent of Morris at his best.
The show does have disadvantages: chiefly, the sketch content sometimes goes over borders many viewers will be uncomfortable with. Indeed, sketches featuring disabled people and child abuse/death are quite common, and are universally shocking.
However, if you think you can stomach taboo humour and have a mind open to such an unusual programme, I highly recommend it. It's likely that in between the guilty laughs and shocked silences, you'll find you take away an appreciation for the atmosphere and some of the questions the pitch black humour poses.
